I had to force myself to laugh , and there were about 3 - 4 Brown Bag fouls . Everyone 's minds were in the gutter . It was ridiculous .

Q with options: Give answer the following question using evidence from the above passage: Why might have I forced myself to laugh ?
Pick from:
(A). Because i do usually enjoy clean jokes .;
(B). Because i do usually enjoy dirty jokes .;
(C). Because i do n't usually enjoy clean jokes .;
(D). Because i do n't usually enjoy dirty jokes .;
(D).