The answer should be D) because A) is not tension, B) is really not tension, and C) is not suspense either so I would go with D) since we don't know what they're talking about and why so quiet.
This is the correct form, though you need to be specific and describe who "them" is.
Answer:
No error
Explanation:
It is caps where it needs to be.
There are no abbreviations.
There are no numbers.
The spelling is good.
