Text 3　　American farmers have beencomplaining of labor shortages for several years. The complaints are unlikelyto stop without an overhaul of immigration rules for farm workers.
　　Congress has obstructed efforts to create a morestraightforward visa for agricultural workers that would let foreign workersstay longer in the U.S. and change jobs within the industry. If this doesn'tchange, American businesses, communities, and consumers will be the losers.
　　Perhaps half of U.S. farm laborers are undocumentedimmigrants. As fewer such workers enter the country, the characteristics of theagricultural workforce are changing. Today's farm laborers, while stillpredominantly born in Mexico, are more likely to be settled rather thanmigrating and more likely to be married than single. They're also aging. At thestart of this century, about one-third of crop workers were over the age of 35.Now more than half are. And picking crops is hard on older bodies. Oneoften-debated cure for this labor shortage remains as implausible as it's beenall along: Native U.S. workers won't be returning to the farm.
　　Mechanization isn't the answer, either—not yet, atleast. Production of corn, cotton, rice, soybeans, and wheat has been largelymechanized, but many high-value, labor-intensive crops, such as strawberries,need labor. Even dairy farms, where robots do a small share of milking, have along way to go before they're automated.
　　As a result, farms have grown increasingly reliant ontemporary guest workers using the H-2A visa to fill the gaps in the workforce.Starting around 2012, requests for the visas rose sharply; from 2011 to 2016the number of visas issued more than doubled.
　　The H-2A visa has no numerical cap, unlike the H-2Bvisa for nonagricultural work, which is limited to 66,000 a year. Even so,employers complain they aren't given all the workers they need. The process iscumbersome, expensive, and unreliable. One survey found that bureaucraticdelays led the average H-2A worker to arrive on the job 22 days late. Theshortage is compounded by federal immigration raids, which remove some workersand drive others underground.
　　In a 2012 survey, 71 percent of tree-fruit growersand almost 80 percent of raisin and berry growers said they were short oflabor. Some western farmers have responded by moving operations to Mexico. From1998 to 2000, 14.5 percent of the fruit Americans consumed was imported. Littlemore than a decade later, the share of imports was 25.8 percent.
　　In effect, the U.S. can import food or it can importthe workers who pick it.

What problem should be addressed according to thefirst two paragraphs?

A.DiscriminationagainstforeignworkersintheU.S.

B.BiasedlawsinfavorofsomeAmericanbusinesses.

C.FlawsinU.S.immigrationrulesforfarmworkers.

D.DeclineofjobopportunitiesinU.S.agriculture.