A(n) allows voters to accept or reject measures proposed by the legislature, such as laws and government policy.
a. direct primary
b. referendum
c. initiative
d. recall

A referendum allows voters to accept or reject measures proposed by the legislature, such as laws and government policy. The other term for referendum is plebiscite. It is a direct vote in which the entire electorate is asked to vote for a specific proposal.

The answer would be letter B.

Primary sources are usually  more accurate and are written by someone who experienced it or witnessed it. secondary sources are those who heard of it after the fact that can lose details and or twist the event in a light that benefits them.