I would say C because this passage talks about green building and how it's beneficial. Sentence 4 mentions about what the green roofs are made of and I don't think that would be necessary to include in this passage.
Personal incidents, if that is one of your choices.
Correct Answer:
A) The sun sets in the west.
Explanation:
The question above resolves a Subject - Verb agreement.
The principle here requires the verb to be pluralized where the subject is singular and singularized if the subject or object is plural.
Another example is given as follows:
The six teachers run the school. Vs
The proprietor runs the coaching class.
B) We had a lot of funds in our last year's college program.
Had here is simple past tense.
C) you will not have to be afraid of anybody if you were not wrong.
Were is also simple past tense here.
D) I started writing the essay when I was in class seven.
Started as used above is simple past tense
E) Our principal used to give us moral support and encouragement frequently
F) in the past, trains used to be driven by steam
