Which of the following contributed to social and political instability in both china and africa?
a. pressure from a growing population
b. increased standards of living among the peasantry
c. declining involvement in foreign trade
d. decreasing opium consumption

A. Pressure from a growing population.

Explanation:

The problem of population growth further gave to new social and political problems like poverty, unemployment and food crises. China with the highest population in the world is already fighting it with family planning policy and an increase in food production. The regions of Africa have contained about 30 percent of the world's hungry population. Measures were talking to for a replacement-level fertility rate, reducing food waste and increasing food productivity.

d. the polar jet stream   lies between the polar easterlies and trade winds should be your answer

the answer to your question is,

old stone age.

-mabel < 3