Answer:
Genetic engineering has been applied in numerous fields including research, medicine, industrial biotechnology and agriculture. In research GMOs are used to study gene function and expression through loss of function, gain of function, tracking and expression experiments.
Explanation:
Al crossmultiplies with 2
S crossmultiplies with 3
Al2S3
The second one I believe.
The answer is A and B.
Hope that helped you.