One Concern with U.S.GAAP Identified by Schipper Is

One concern with U.S.GAAP identified by Schipper is:

A) The principles that underlie U.S.GAAP can become rules-based exercises during implementation
B) The principles that underlie U.S.GAAP do not provide any implementation guidance
C) The rules that are part of the U.S.system are not based on an underlying conceptual framework
D) The rules that are part of the U.S.system are not based on any principles