Final answer:
The series of metamorphic rocks that clay can progress through if buried deep within the Earth is shale, slate, phyllite, schist, and gneiss.
Step-by-step explanation:
The series of metamorphic rocks that clay can progress through if it is buried very deep within the Earth is: A) Shale, Slate, Phyllite, Schist, Gneiss.
Metamorphic rocks are formed when high temperature or pressure alters existing rocks physically or chemically. In this series, clay progresses from shale to slate, then to phyllite, schist, and finally gneiss. Each rock in the series has distinct characteristics and mineral compositions.