Mapping an FX forward contract to the corresponding spot exchange rate (along with the respective domestic and foreign interest rates) is a standard and appropriate risk mapping procedure, as the spot rate is the primary underlying risk factor for the forward.

• Option B is inappropriate because mapping corporate bonds only to government bonds ignores credit spread risk, which is a significant component of a corporate bond's risk profile.
• Option C is backwards; typically, coupon-bearing bonds are mapped to a series of zero-coupon bonds (the elementary risk factors), not the other way around.
• Option D is incorrect because a stock market index represents a diversified market risk factor, and mapping it to a single stock would grossly overestimate idiosyncratic risk while failing to accurately capture the broader market risk.