Frost Wedging Would Be Most Prominent In

Frost wedging would be most prominent in:

A) mid- latitude regions where temperatures hover around 0^°C (32^°F) during certain seasons.
B) desert regions where day and night temperatures fluctuate radically for much of the year.
C) low- latitude rainforests where there is abundant moisture to enter fractures and pores in rocks.
D) polar regions where temperatures remain below 0^°C (32^°F) most of the year.