It's C. A and B are wrong.
Answer:
d. all of the above
Explanation:
Disengage means to separate something from something else. When you detach, release, or free something from something else, you disengage it.
Plural verbs go with singular subjects (False), so (D) is your answer.
An example would be "The cat are fun."
I would say A, that seems like the best answer! :)