A. They are weather researchers.
B. They study human health in response to atmospheric conditions.
C. They study people’s emotional changes under different weather conditions.
D. They forecast weather conditions.

A. You should yell at the manager if you want to complain.
B. You should contact the manager if you have any dissatisfaction.
C. You should complain about the manager because it’s all his faults.
D. You should argue with the manager about your complaint.