In general, which of the following statements about metals is true?
a. metals need to be stored in sealed containers for safety.
b. metals show a wide range of chemical properties.
c. metals are highly reactive substances.
d. metals do not react with oxygen.

a. Metals need to be stored in sealed containers for safety.
b. Metals show a wide range of chemical properties.
c. Metals are highly reactive substances.
d. Metals do not react with oxygen.

The statement about metals that is true is that Metals are highly reactive substances. The answer is letter C.

alfred von schlieffen, german army chief of staff, was given instructions to devise a strategy that would be able to counter a joint attack. in december, 1905, he began circulating what later became known as the schlieffen plan. schlieffen argued that if war took place it was vital that france was speedily defeated.