Yup - I think (B), as well. Credit risk is one sided in option contracts, so if we write an option contract we’ll be compensated immediately through the premium payment from the buyer of the option contract. The buyer of the option contract will be exposed to the credit risk that we will not deliver shares or payment if the contract is exercised by the option buyer. As such, credit risk is the lowest in this scenario.
Hope this helps!
OMGMileyCyrus