Researchers Are Concerned That the Weight of the Average American

Researchers are concerned that the weight of the average American school child is increasing implying, among other things, that children's clothing should be manufactured and marketed in
Larger sizes. If X is the weight of school children sampled in a nationwide study, then X is an
Example of

A) a categorical variable.
B) a discrete variable.
C) a continuous variable.
D) a table of random numbers.