For the farmer who takes care to keep them cool, (providing them with high-energy feed, and milking them regularly, Holstein cows are producing ) an average of 2,275 gallons of milk each per year.
A. providing them with high-energy feed, and milking them regularly, Holstein cows are producing
B. providing them with high-energy feed, and milked regularly, the Holstein cow produces
C. provided with high-energy feed, and milking them regularly, Holstein cows are producing
D. provided with high-energy feed, and milked regularly, the Holstein cow produces
E. provided with high-energy feed, and milked regularly, Holstein cows will produce