Jet Engine Manufacturing Entails Enormous Economies of Scale

Jet engine manufacturing entails enormous economies of scale.Pratt & Whitney,a large U.S.jet engine producer,faces substantial competition from Rolls-Royce,the British engine manufacturer.What would be the BEST way for P & W to cope with a dollar that has recently appreciated by 50%?

A) accelerate R&D spending and cost?cutting efforts
B) shift some of its production abroad
C) raise the foreign currency prices of its engines sold abroad
D) buy dollars forward