Respuesta :
Answer : Malik's experiment included to create artificial atmospheric oxygen; in order to perform experiment on red-legged grasshopper for growing it larger than normal, the part of recreating or mimicking the artificial oxygen for the experiment with additional 10% increase seems to be bit difficult and this may create a problem in defining the accuracy and precision for the experiment.
Answer:
C.
He varies the nitrogen and carbon dioxide levels in the air from one trial to the next.
Explanation: