Select the most appropriate option for the given blank.
Please _________________ my apology for this mistake.

Correct option is C

The correct option to fill in the blank is (c) accept.
Explanation of correct answer: "Accept" is the appropriate choice as it means to receive something willingly or to agree to something, which fits the context of receiving an apology.
Meanings of other options:
· Develop - To grow or cause to grow and become more mature, advanced, or elaborate.
· Acquire - To buy or obtain an object or asset for oneself.
· Obtain - To get, acquire, or secure something.