(1) Every summer, I visit my grandparents’ farm in Iowa. (2) When I am there, I help with some of the chores, such as weeding the vegetable garden and milking the cows. (3) I do not spend all my time working, however. (4) When the weather is good, I get together with some of the teenagers who live in the area, and we spend the day doing outdoor activities. (5) We play baseball, go swimming, and have picnics. (6) The days we go horseback riding are the best of all. (7) I love the feel of the wind in my hair, and I enjoy looking at the beautiful scenery Which is the most effective way to invert sentence (6) in order to vary sentence patterns?

a. Best of all are the days we go horseback riding.

b.Horseback riding days are the best of all.

c. Best of all, some days we go horseback riding.