C, Compound. This is because there is just a independent clause and dependent clause. As in complex compound complex there would be more dependent clauses.
The sentence is:
Your presence at the funeral of your best friend's father is an indispensable consolation for your friend.
Answer: Tommy's mother is filled with horror and she is trying to save her son from the viscous crowd who clearly mean to do harm. This could have an emotional effect on the viewer as it displays the mother's drive to save her son, a drive that all mothers have, not to mention the tensions and fears running high in this scenario.