C is correct. To enter into a long 6-month forward contract, we need to find the 6-month forward ask price. The first step is to calculate the spot-ask from the provided information.

Spot ask = 1-month forward ask - 1-month points / 10,000 = $1.2208 - 6.0 / 10,000 = 1.2202$

Then add the 6-month ask points to the spot-ask found in the prior step: 6-months forward ask = $1.2202 + 45.0 / 10,000 = 1.2247$

A is incorrect: 6-months forward bid is $1.2200 - 45.0 / 10,000 = 1.2155$

B is incorrect: If instead of spot ask use bid, 6-months forward ask is $1.2200 + 45.0 / 10,000 = 1.2245$

D is incorrect: If instead of spot ask use 1-month forward ask, 6-months forward ask is $1.2208 + 45.5 / 10,000 = 1.2253$