在回归和相关分析中，表示（）

A.A

B.B

C.C

D.D

E.E

Fire in an engine compartment is best extinguished with carbon dioxide gas (CO₂) and by（）.

A.completely closing the compartment

B.closing the compartment except for the ventilators

C.leaving the compartment open to the air

D.increasing the air flow to the compartment by blowers