What is inbreeding depression?
a. too many recessive deleterious alleles appear in the population
b. a population goes extinct because it is just too small.
c. the population stops breeding and goes extinct
d. none of the above

the correct answer is d. none of the above.

Explanation:

Inbreeding depression is the reduced biological fitness in a given population as a result of inbreeding, or breeding of related individuals. In general, the higher the genetic variation or gene pool within a breeding population, the less likely it is to suffer from inbreeding depression.

they encountered severe weather for which they were poorly prepared.

answer; earthquake;