Which of the Following Statements Is True Regarding Generally Accepted

Which of the following statements is true regarding generally accepted accounting principles (GAAP) ?

A) GAAP is a set of laws
B) GAAP is subject to change as conditions warrant
C) Under GAAP, if two companies engage in the same transactions, they must choose the same accounting methods
D) U.S. GAAP is the same as GAAP in other countries