Which of the following is not a barrier to economic development?
a.
foreign debt
b.
political stability
c.
widespread disease
d.
low levels of social welfare

The correct answer is B. Political stability is not a barrier to economic development.

Explanation:

Political stability is a concept that encompasses a set of situations that make the normal and beneficial development of political life in a given society or nation.

The main components within this concept are an efficient and real democracy, where the will of the citizen is reflected in the acts of the government; the transparency and honesty of the acts of government officials; and the good and fluid relationship between the different sectors or currents of politics.

Political stability generates an ideal climate for business and investment development, since it minimizes the risk of political or social crisis. Therefore, it is not a barrier to economic development but, on the contrary, it is a situation that drives development and generates greater advantages.

81 is a composite number.