Can someone explain me this and give me a example

for ex Q1- The kitten GREW faster than i expected.

Explanation:

its past tense and makes sense

Q2- Fallen

Q3- Blew

Q4- Chosen

Q5- Does

Q6- ?

Q7- Flew

Q8- Eaten

Q9- Came

Q10- Grown

Q11- Chosen

Q12- Seen

Q13- Threw

Q14- Driven

Q15-Drew

Q16-?

the answer should be b.

explanation:

it should be b because she researched before writing so it would be in past tense. "the author researches her subject before she had written the first draft.