A. heating melting crystallization
b. weathering melting lithification
c. heating pressure crystallization
d. weathering deposition lithification

Referring to the diagram below which represents the complete rock cycle, we will find that:
Igneous rocks are converted to sedimentary rocks through two steps:
1- Igneous rocks undergo Weathering and erosion to form sediments
2- These sediments are then compacted and Lithified (cemented) forming the sedimentary rocks.

Based on the above, the best choice would be:
d. weathering deposition lithification

We have no idea what the graph shows, or why it may be accurate,  because we can't see the graph.on a different subject, choice ' d ' is the only true statement among the choices.

B? i think so but hope that's right and answers your question