Currently,you Can Exchange US$1 for £0

Currently,you can exchange US$1 for £0.53.Assume that the average inflation rate in the US over the next four years will be 4 per cent annually as compared to 5 per cent in the UK Based on relative purchasing power parity,you should expect the _____ over the next 4 years.

A) US dollar to appreciate against all currencies
B) British pound to appreciate against all currencies
C) both the US dollar and the British pound to appreciate against all other currencies
D) US dollar to appreciate against the British pound
E) British pound to appreciate against the US dollar