Assume the current U.S. dollar-yen spot rate is 90 /$. Further, the current nominal 180-day rate of return in Japan is 1% and 2% in the United States. What is the approximate forward exchange rate for 180 days

A) 89.12/$

B) 89.55/$

C) 90.89/$

D) 90.45/$

please show the answer brefiely.