The Following Regression Was Conducted for the Exchange Rate of the British

The following regression was conducted for the exchange rate of the British pound (BP) :
Regression results indicate that a₀ = 0 and a₁ = 2. Therefore,

A) purchasing power parity holds.
B) purchasing power parity overestimated the exchange rate change during the period under examination.
C) purchasing power parity underestimated the exchange rate change during the period under examination.
D) purchasing power parity will overestimate the exchange rate change of the British pound in the future.