The accompanying photo is of a stretched pebble conglomerate. The sequence of events that formed this rock is:

Stretch pebble conglomerate

a. It was formed first as an igneous extrusive rock and was then metamorphosed under conditions of uniform stress

b. It was formed first as a metamorphic rock under conditions of differential stress and was then weathered to form a clastic sedimentary rock deposited under low energy conditions

c. It was formed first as a clastic sedimentary rock under low energy conditions and was later metamorphosed under conditions of uniform stress

d. It was formed first as a clastic sedimentary rock under high energy conditions and was later metamorphosed under conditions of differential stress

e. It was formed first as a biochemical sedimentary rock and was later partially melted to form a migmatite.