The answer is B because it doesn't have any commas and it wouldn't make sense without it. Looks like you got it correct.
"Though we were the closest thing Pranab Kaku had to a family that day, we were not included in the group photographs that were taken on the grounds of the country club, with Deborah's parents and grandparents and her many siblings" &" Deborah had made sure that my parents, who did not eat beef, were given fish instead of filet mignon like everyone else<span>."</span>
Answer:
Early Bird catches the worm.
Explanation:
Because it means the one that arrives first has the best chance for success.