Read the short passage that follows. Determine which part is the fragment.
(A) Joshua found the pressure from the gas in his stomach unbearable. (B) Although he didn't want to be rude in the middle of geology class. (C) An explosive belch erupted from his mouth.
The fragment is the part of the sentence that doesn't make sense on it's own. For this the answer is B. Read each of the choices individually and the part that doesn't make any sence is the answer.