Which of these best summarizes the reasons for Africa’s ongoing conflicts? Select one:

a.

Continuing apartheid in some nations has fueled violence against white rule.

b.

Former African colonizers continue economic ties that prevent free enterprise.

c.

Corrupt governments have taken advantage of poverty and different ethnicities to seize power.

d.

Civil wars in most of Africa did not destroy the basic infrastructures.

What is the rule relating the ratio of marginal utility to prices of two goods at the optimal choice? explain why, if this rule does not hold, the choice cannot be utility-maximizing.

Peggy feels sorry for smokers who have lung cancer because she believes they were duped by tobacco companies to develop a deadly addiction and are therefore not responsible for their disease. when asked to donate money to support lung cancer research, peggy gives generously. peggy’s prosocial behavior can best be explained by the arousal: cost-reward model. the negative state relief model. a norm of equity. attributions of responsibility.

With regard to personality, it appears that: a) there is little consistency of behavior from one situation to the next and little consistency of traits over the life span.b) there is little consistency of behavior from one situation to the next but significant consistency of traits over the life span.c) there is significant consistency of behavior from one situation to the next but little consistency of traits over the life span.d) there is significant consistency of behavior from one situation to the next and significant consistency of traits over the life span.