One of the most efficient ways for researchers to better understand the influence of genetics and environment is to . do field research in elementary school classrooms conduct twin studies do archival research conduct clinical interviews of parents 3 attempts remaining

option b is correct

Explanation:

For researchers to better understand the influence of genetics and environment, the most efficient way is when these researchers conduct their research on twins(two babies giving birth to the same mother at almost the same time with the same pregnancy) which is known as TWIN STUDIES.

Although, identical twins have the same genes, they are also going to be affected by environmental factors and scientist use twins to explain how environmental factors can affect genes.

the answer is:

c. economic output

c- companies fail to take environmental protection into account. i think