Answer:
c
Explanation:
Because it's how the speaker feels
I had played football.
This is past perfect form pf the sentence.
Answer:
a. The second sentence provides background for the first
Explanation:
According to the first sentence, research has proven that colorful and vivid advertisements helps to attract more people.
Additionally, the second statement says that marketers use various research studies to develop their advertisement.
The relationship between the two sentences is that the second sentence provides background for the first by explaining how the market research has helped.
Where a person or species lives in or occupies
It makes the reader decide for themselves.
Hemingway thought to many adjectives would force the how to feel about things.