[1] thomas jefferson was the primary author of the declaration of independence.
[2] jefferson began writing in early june of 1776, and he took three weeks to finish the first draft.
[3] the delegates of the second continental congress reviewed the document during the last week of june. which is the best way to revise sentence 2 to improve sentence variety in the paragraph?
a) in early june 1776, jefferson began writing, and he took three weeks to finish the first draft.
b) jefferson, who began writing in early june 1776, took three weeks to finish the first draft.
c) the first draft, which jefferson began writing in early june 1776, took him three weeks.
d) jefferson took three weeks to finish the first draft, which he began writing in early june 1776.

The correct answer is The first draft, which Jefferson began writing in early June 1776, took him three weeks.

Explanation:

The sentences given in the question follow the same pattern: subject (Thomas Jefferson, Jefferson, The delegates of the Second Continental Congress), ver (was, began, reviewed) and predicate (the primary author, in early June, the document during...)

If we use the order provided in letter C, we can improve sentence variety by using a subject (The first draft) and then a relative clause to define the previous noun; in option C it is marked by the word which and the comas. It is also correct since we know by context that the draft the speaker is talking about is the Declaration of Independence. The information provided in the sentence "Jefferson began writing in early June of 1776, and he took three weeks to finish the first draft" is just reordered but the most important factors are mentioned, such as the author, when he began, and how long it took him.