Which use of pacing creates the most urgent mood

C. creates the most urgent mood.

Comparing to the others, C. has the fastest pacing, as you can see the sentence are cut short. Sentences like “No! No time.” and “threw open the door” also creates an urgent feeling.

Meanwhile for A., the pacing is slower with the use of inversion. It is unlikely for the reader to sense the urgency from such slow pacing.

For B., the pacing is more urgent, but the continuous actions that are narrative did not creat a strong sense of urgency.

For D., although the message of rushing against time is implied, the pacing in sentense is relatively weak as you can see from the long sentense.

Hope it helps!

about the letter or who wrote the letter

you harly even have 1,278 followers but your following 4,983 which means 3705 people are not really into what you post. what i recommend to do is to ask them what they would like to see and i recommend to be safer on what you post. stay safe and dont use a homework website to boost you followers.