What Is the Distinction Between an Intelligence Test and an Achievement

What is the distinction between an intelligence test and an achievement test?

A) There is no difference; they are two terms for the same thing.
B) An intelligence test measures verbal comprehension, while an achievement test never does.
C) An intelligence tests measures what a person already knows, while an achievement test measures the highest level of learning they could achieve.
D) An intelligence test measures a person's capacity to learn, while an achievement test measures what a person has already learned and retained.