【单选题】

What is the general attitude of the OECD towards GDP
A．(A) GDP is not a reasonable indicator of well-being.

B．(B) GDP is the best available indicator on a timely basis, so there is no need for any reform.
C．(C) When other factors are included, GDP is not very reliable.
D．(D) GDP needs to be complemented by other measures for better economic performance evaluation.