Question

the temperatures on mercury are ______.
a bearable
b extreme
c steady
d relative

Explanation:

Mercury has no atmosphere to retain heat, so its temperatures range from extremely hot (around 427°C during the day) to extremely cold (around -173°C at night). "Extreme" fits this description. "Bearable" is incorrect as the temperatures are not suitable for life. "Steady" is wrong because temperatures fluctuate drastically. "Relative" doesn't describe the temperature range accurately.

Answer:

B. extreme