Mark the letter A, B, C, or D on your answer sheet...

Câu hỏi: Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

Why do we spend so much on things that give us tiny increases in comfort of_________so many other people.

A. at the expense

B. at the price

C. at all cost

D. into the bargain