For the 'farmer' question, I do not think any of the options are correct. What is source of the question?
I gave a search on google, look what I found. Following paragraph is taken from 'scienceonline'.
When it comes to milk production, nothing beats Holsteins. For the farmer who takes care to keep them cool, sated with high-energy chow, and milked regularly—often under the management of a sophisticated computer—these familiar black-and-white cows produce an average of 2,275 gallons of milk each per year. The average Brown Swiss, in contrast, produced only 1,820 gallons last year, and a Jersey less than 1,600.