According to the recent research, heavy coffee drinking and heart attack is not necessarily _________ and effect．

1. A.
   reason
2. B.
   impact
3. C.
   fact
4. D.
   cause

According to the recent research, heavy coffee drinking and heart attack is not necessarily ______ and effect.

According to the recent research, heavy coffee drinking and heart attack is not necessarily ______ and effect.

A．reason           B．influence          C．fact              D．cause

According to the recent research, heavy coffee drinking and heart attack is not necessarily      and effect