You bought Indian rupee (INR) when the exchange rate was 70 INR : 1 USD. A year later, the exchange rate was 100 INR : 1 USD. In that year:

a. The rupee strengthened against the USD and would have helped companies exporting out of India, all else equal

b. The rupee weakened against the USD and would have helped companies exporting out of India, all else equal

c. The rupee weakened against the USD, but currency changes do not impact exporters

d. The rupee strengthened and helped U.S. investors owning Indian stocks.