Which of the following sentences is redundant?

third one or c

Explanation:

the line at the cash register took much longer than usual, we waited for fifteen minutes longer than normal

the correct answer is:

this is an example of the writer telling through description rather than showing through dialogue.

sometimes writers like to explain explicitely what's happening instead of adding dialogues of the situations., which is the case in this passage,

we need more information in order to answer.