First of all, I love that movie. Second of all, they mean that in that moment that they were together on the car, they all felt unstoppable. That is why he says “ in that moment I swear we were infinite..” meaning he felt they felt anything was possible.
I don't think a correction is necessary. Both parts of the sentence are already in the present tense. Plus, the use of "us" in the beginning of the sentence indicates a personal attachment.
Answer:
Someone in their family getting cancer/dying and losing faith in their religion.
Explanation:
Wars, make people lose faith in humanity
D is the answer to your question
"Megan Parker keeps running to check her mailbox, she is waiting for a letter from my cousin."
Correct version
"Megan Parker keeps running to check her mailbox. She is waiting for a letter from her cousin."