Professor Zheng Zhao Wanted to Study the Cause for Thousands

Multiple Choice

Professor Zheng Zhao wanted to study the cause for thousands of people leaving Hong Kong to move to Toronto,Ontario.In order to establish temporal order in his causal argument,he must show which of the following?

A) There is a correlation between events in Hong Kong and a decision to move.
B) Events occurred in Hong Kong before people moved to Toronto.
C) The type of people who left Hong Kong are more educated and have more money than those who stayed.
D) A fear for the future of Hong Kong and no other reason caused the move to Toronto.
E) Hong Kong media reports about a high quality of life in Toronto and relatives in Canada were not major factors in the decision for people to move.