Which of the Following Statements About the Population Pyramids for Advanced

Which of the following statements about the population pyramids for advanced industrial countries is correct?

A) There are bulges in the pyramid for particular cohorts, but for the most part the cohorts pass in a regular fashion through the stages of life.
B) They tend to have a broad top, which gets progressively narrower toward the bottom.
C) They tend to have a bulging middle, a very narrow base, and a sharp point.
D) They tend to have a very broad base and a sharp point at the top.