Which statement about brackets is true?
i. brackets often come in threes or fives.
ii. brackets can indicate a change in verb tense.
iii. the phrase [sic] indicates an error in a quoted excerpt.
a. ii only
b. ii and iii
c. i and iii
d. i, ii, and iii

The answer to your question would be that the statements that are true about brackets are the following ones: "Brackets can indicate a change in verb tense" and "the phrase [sic] indicates an error in a quoted excerpt". That is, the correct option would be B, II and III.

You should use brackets to indicate a change in verb tense. With respect to the phrase [sic], it can be used as an adverb to denote that something is quoted as is, including mistakes. If you want to quote something and realize that the source material contains a spelling or grammatical error, you should use sic right after the mistake.  

which of the following was specifically permitted by the emancipation proclamation?

free african americans were allowed to fight for the confederacy.

free african americans were allowed to enlist in the union army and navy.

enslaved people in border states were allowed to move to the north.

enslaved people in border states were allowed to become confederate citizens.rgt jr[tolgprtkm ][ptr j[otrmnt'prgp vbl nbgkrm; y l; jebt'

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