What is the wedge theory ?

In the years after world war ii, which of the following caused many people from asian and african countries to migrate to europe? a. the end of the soviet union b. new economic opportunities after colonialism ended c. the religious freedom found in europe d. new laws allowing greater numbers of immigrants into european countries

When the communist, under mao, took control of china in 1949 they announced total support support for which country and its ideology?

Experiment to investigate effect of medication on levels of stress in males and females. dependant variable?