I WILL GIVE BRAINIEST Which word or phrase does the bolded word refer to?

I have researched French history extensively.

Which word or phrase does extensively refer to?

Choose 1

(Choice A)
A
researched

(Choice B)
B
French

(Choice C)
C
history

(Choice A)  A . researched

Explanation:

The word 'extensively' is a degree adverb with a -ly Suffix. To do so something extensively means that a task gets done to a great extent. In this example, it doesn´t refer to either history or French because those are not verbs that can be modified by an adverb. There´s only one verb, 'researched', which can be modified by it. As it´s customarily, the adverb is after the verb that is modifying.

the purpose of the heading in the passage is to identify who is telling the story.

this excerpt is part of the book sugar changed the world (2010) written by marc aronson and marina budhos. as the book has been written by two people, the heading "marc" indicates that this specific excerpt is being narrated by aronson. in the fragment, marc describes his grandfather's story after hearing it from his cousin. however, there are other excerpts where budhos is the one that tells the story of her family.

aronson and budhos, who are husband and wife in real life, decided to write sugar changed the world when they found out how sugar, which had an important role in slavery and economy, changed their ancestors' lives.

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