Early evolutionary pressures favored humans who ___________, and ...

[crobinson2013]

Early evolutionary pressures favored humans who ___________, and by doing so, sculpted much of the social behavior we observe today.
 
  a. chose to associate with others
  b. focused on the family unit
  c. were more competitive with one another
  d. exhibited strong emotional reactions

Question 2

Which ability most contributes to the strength and endurance of the human species?
 
  a. our ability to take full advantage of our physical equipment
  b. our ability to communicate, work together, and form alliances
  c. our ability to trust and be trusted
  d. our ability to instill fear in our enemies

[brittiany.barnes]

Answer to Question 1

ANSWER:
a

Answer to Question 2

ANSWER:
b