How is the word (turned) used in the following sentence?

Question

When it came to autumn,my thoughts often turned to the years I had spent
quarterbacking my high school football
team.
A. Subject C.Direct object
B. Verb D.Object of preposition
Answer :B
Is it correct

Answer 1

yes

Answer 2

B is correct.

Answer 3

Y-E-S Yes.it is very obvious