Answer:
B
Step-by-step explanation:
Do not pick (A) because yes, your teacher does decided your grade, but their feedback is valuable because they have been around longer, and know more than you.
(C) is not a valid option because although teachers do read, that doesn't make their feedback valuable.
And (D) is sdklngrklgbnfdlbinosgosins definitely not an option. Just because a teacher is a teacher doesn't mean that he/she is an expert writer. They might be good at writing, but it doesn't mean that they are experts.
Voting out A, C and D, really only leaves option B.
I hope this helps and I hope that it is right. Thank you.