All of the Following Statements About the Safety of Ecstasy

All of the following statements about the safety of Ecstasy are supported by research, EXCEPT:

A) Most of these risks of Ecstasy use appear to result from extremely heavy use.
B) Ecstasy has not been proven to cause brain damage in humans.
C) There have been very few deaths reliably attributed to Ecstasy taken alone.
D) Ecstasy is the safest drug to be taken along with alcohol.