A compound is a pure substance that is composed of more than one type of element. Which of the following statements is true of compounds?. . A.Compounds can be decomposed into their component parts through physical processes.. . B.There is only one type of compound, so they all have similar characteristics and compositions.. . C.Compounds have definite chemical compositions that can be described by chemical formulas.. . D.Compounds have properties which are identical to the properties of their component elements..