I think it is A) but someone might need to double check that.
This is a question that would have literally have taken two seconds to look up on google but the answer is 1.88 years.
A. A flood would have the most positive effect
Answer:
the simplified expression is written as 3.4 x 10³
Explanation:
Given expression;

in scientific notation, the expression is simplified as;

Therefore, in scientific notation, the simplified expression is written as 3.4 x 10³