Based on information from the lesson, what is the most likely explanation for the following scenario?

When Raphael walks into the supermarket, he grabs a bunch of large yellow bananas. These bananas look identical to every other banana Raphael has ever seen because this banana, the Cavendish, is one of the only varieties of bananas grown and sold in the United States.
Farmers learned Americans prefer the taste of Cavendish over other varieties of bananas and now it is grown exclusively.
Farmers were pressured by the United States government to grow the Cavendish exclusively.
Farmers determined the Cavendish required the least amount of effort to grow.
Farmers artificially selected and farmed the Cavendish while discarding less successful varieties.