Measurements of carbon dioxide concentrations in the air taken over the past decade have shown a
A B C D
leveling off. slow increase. steady decline. dramatic increase.
Question: Measurements of carbon dioxide concentrations in the air taken over the past decade have shown a
(A) leveling off.
(B) slow increase.
(C) steady decline.
(D) dramatic increase.

Answer: (D) dramatic increase.
Answer: (C) steady decline.
Question: Measurements of carbon dioxide concentrations in the air taken over the past decade have shown a
(A) leveling off.
(B) slow increase.
(C) steady decline.
(D) dramatic increase.
Answer: (D) dramatic increase.