【单选题】Question 3. The main idea of paragraph 2 is that _______. -----Passage 1----- (Para. 1) At one time a traveler could learn about a region by looking at the houses, for example, he or she could underst...
A.
thick walls absorb heat from the sun
B.
people built houses to fit the climate
C.
people are comfortable in their houses
D.
in desert regions, daytime temperatures are lower than nighttime temperatures