In this question, sentence is given with blank to be filled in with an appropriate word. Four alternatives are suggested for question. Choose the correct alternative out of the four.
We all laughed _________ the affair.

Options

A. 1) over
B. 2) about
C. 3) for
D. 4) on

Answer

B

Explanation

laugh about (Idiom) : to chuckle or giggle loudly about someone or something
Here, about is the right usage.