Which the following statements is true concerning human foraging groups?
a. Women do not forage enough food to feed themselves at any point and are entirely reliant on men.
b. Men provide the majority of calories in any given group while they are adolescents, but their production drops off after the age of 20.
c. Men frequently share the food they obtain with other group members.
d. Children can obtain enough food to feed themselves by the age of 10 years.