Answer:
Experiments reveal that human behavior is greatly influenced by humans' desire to fit in.
Answer:
D, budget. The others did not make sense.
Add on:
sorry if its incorrect/hope this was useful to you.
Answer: need a little more background information
Explanation:
The preposition 'since' always shows a time relationship from the past to the present.
When you say 'since Monday' it means that he didn't have a car available from Monday until now.So, a time relatioship