Perchlorate salts of transition metals have the potential to be explosives and should be handled with care.

Perchlorate salts of transition metals have the potential to be explosives and should be handled with care. Using the above information, which of the following could be considered to be an explosive and thus should be handled with due care?

A.

NaClO4

B.

Mg(ClO4)2

C.

Mn(ClO4)4

D.

Ca(ClO4)2