This Figure Has Rock Units and Geologic Features That Are

Multiple Choice

This figure has rock units and geologic features that are assigned letters that are not in any particular order.From the geologic relations, what is the oldest unit or feature of those listed below?

A) the canyon (feature N)
B) lava flow (unit L)
C) dike (unit D)
D) fault (feature F)
E) old river channels (feature R)