Two goods, X and Y, are called complements if stion 10 yet wered O A. an increase in Px causes more Y to be bought Tked out of 0 B. an increase in Px causes less Y to be bought Flag vestion O C. an increase in income causes more of both X and Y to be bought O D. an increase in Py causes more Y to be bought. Jump to... Lecture 4-chapter 3