Question

4. Gene laughed throughout the movie. His date didn't laugh once.

a. Gene laughed throughout the movie his date didn't laugh once.
b. Gene laughed throughout the movie, but his date didn't laugh once.
c. Gene laughed throughout the movie, his date didn't laugh once.

Answer 1

b. Gene laughed throughout the movie, but his date didn't laugh once.

Step-by-step explanation:

because as gene laughed his date didn't

so no comma needed as that third option nor blank as that first option