A few sentence revisions (verbs)

I did them and I hope someone can check them for me. I have multiple people checked on it. We had some arguements over those below.
Please help me, and any response is appreicated. Thank you

For each of the following sentences, choose the revision that corrects any unnecessary shifts in tense, voice, or person. If the original sentence is correct, choose "no change."

64. (I choose C)
It evolved into French Sign Language, which is still in use in France today.

A. It evolves into French Sign Language, which is still in use in France today.
B. It had evolved into French Sign Language, which was still in use in France today.
C. no change

11. (I choose C)
People visiting my room often take one look at my desk and then looked away in embarrassment.

A. People visiting my room often take one look at my desk and then look away in embarrassment.
B. no change
C. People who visited my room often take one look at my desk and then looked away in embarrassment.

13. (I choose B)
They could be embarrassed by the piles of books and documents I have in various places around my computer.

A. They could be embarrassed by the piles of books and documents I did had in various places around my computer.
B. They could be embarrassed by the piles of books and documents I had in various places around my computer.
C. no change

17. (I choose B)
You see, I organize my books and documents in piles, with each pile having only those materials I need for one specific assignment.

A. You see, I organized my books and documents in piles, with each pile having only those materials I need for one specific assignment.
B. no change
C. You see, I organize my books and documents in piles, with each pile having only those materials I needed for one specific assignment.