By he NIH trying a new drug to help reduce pain associated with sickle-cell anemia, it's an example of an "experiment".
An experiment involves a hypothesis (an educated guess as to what's going to happen) and trying out the hypothesis and finding the solution.
I think it's C because he acts suitable according to his age hut the little sister behaves selective.
Hope it helps!
#MissionExam001
Answer:
She should stop and let the pedestrian cross the road
Explanation:
Answer:
Lead III
Explanation:
....records from left leg
