(! best answer gets !

energy from the sun and earth's interior drives the cycling of materials, including the rocks and minerals. the physical and chemical changes that occur in earth's materials is caused by this flow of energy and cycling of materials. this diagram shows the processes involved in the rock cycle. depending on environmental and other factors, rocks can spend anywhere from 200,000 years to millions of years in any stage of the cycle. based on this information and the diagram shown, which statement best describes the sequence of the rock cycle?

a)
igneous rock changing to sedimentary rock takes the longest amount of time, because it must first become sediment.

b)
because the steps occur in the same order and is continuous, scientists can accurately determine how long rocks take to change.

c)
each type of rock has three different methods of changing into another, but melting and cementation take the least amount of time.

d)
processes, like melting, crystallization, and weathering, act together to form rocks and minerals, but the rate of change varies.