Causal Ordering Is Difficult to Establish,but It Is Considered Valuable

Multiple Choice

Causal ordering is difficult to establish,but it is considered valuable because researchers often want to understand

A) why something is happening,not simply that it is happening.
B) our capacity to make our own choices and act autonomously.
C) which variable came first,thus influencing another variable.
D) how people report data differently if the researcher is present.