How did Washington become the first President of the United States?

Explanation:

its B

B) He was elected by an unanimous vote

Explanation:

When the Second Continental Congress assembled in Philadelphia in May 1775, Washington, one of the Virginia delegates, was elected Commander in Chief of the Continental Army. ... When the new Constitution was ratified, the Electoral College unanimously elected Washington President.

in the following paragraph, the fourth sentence the correct answer is: three personal subject pronouns

”she was embarrassed when she found that they had been put back on the shelves…”

a   subject pronoun is a personal pronoun. i, you, he, she it, we, they.  

in the sentence it can be observed she, used twice and they used once. is for this reason that is a three personal subject pronoun sentence.