Which one of the following sentences is correct: O a The investors take long position by purchase a futures contract based on the view that currency will fall in value Ob The investors take long position by selling a futures contract based on the view that currency wit fall in value O c. The investors take long position by purchase a futures contract based on the view that currency will rise in value Od The investors take long position by selling a futures.contract based on the view that currency will rise value e All answers are wrong