Which word could best replace either the underlined clause or word in the paragraph?

“let sleeping dogs lie,” my mother told me. my sister and i had been arguing over a blouse she had borrowed from me and left in a heap on the floor. my mother finally made her wash it and put it back in my closet, but i couldn’t let it go. i was still angry. when i mentioned the blouse again, my mother said she wanted to avoid hearing anything more about it.

a.
enough

b.
fine

c.
skip

d.
stop