Which of the following statements reflect observations and/or inferences upon which Darwin based his ideas about evolution by natural selection?
I. More individuals are born than survive.
II Populations in nature remain approximately stable in size.
III. Individuals compete for resources.
IV. Individuals of the same population vary in their characteristics.
V. Much variation is inherited.
a. I only
b. I and II but not III, IV, nor V
c. I, II, and III but not IV nor V
d. I, II, III, and IV but not V
e. I, II, III, IV, and V