The Ecology and Sex Roles Are Related in the Sense

The ecology and sex roles are related in the sense that

A) men strive to change the surrounding ecology more than women.
B) in harsher climates there are more egalitarian sex roles than in more benign climates.
C) a shortage of food is associated with increases in warfare among men.
D) egalitarian sex roles are more common where food is plentiful and easily acquired.
E) the most chauvinistic societies tend to be in areas with the most variable rainfall.