One important advantage that primary soruces have over secondary sources is that primary sources offer a firsthand account of an event - b, which isn't the case with secondary sources. Although this leaves primary sources prone to being biased compared to secondary sources.
Answer: it’s A, B, C
Explanation: I just did it
1 to 4 is the ratio that is 1/2 and 2
<span>Rachel carson's book silent spring, published in the 1960s </span><span>awakened the American public to negative effects of artificial hormones and industrial chemicals.
The book was a documentary created to see the chemical usage of several agricultural companies. It discovered the negative effect of pesticides for the Environment</span>
The seasonal gatherings are going to occur in the summer<span />