Question

What's the major difference between social Darwinism and Darwin's idea of "survival of the fittest"?
A. Social Darwinism applies only to nonhuman animals; Darwin's idea of "survival of the fittest" applied only to humans.
B. Social Darwinism was highly accepted; Darwin's idea of "survival of the fittest" was, and still is, a source of controversy.
C. Social Darwinism was the idea that the strong should help the weak; Darwin's idea of "survival of the fittest" was that the weak should simply die off.

Answer 1

It wouldn't all fit in one place, so D is:
D. Social Darwinism was the opinion that the weak should die off; Darwin's idea of "survival of the fittest" was the observation that the weak did die off.

Answer 2

It's D