You need to override the default value for the expiry calculation for reward points used by the Reward Points
module. Which of the following XML fragments should you use in your modules config.xml?

A.
default/enterprise_reward/general/expiry_calculation with a value of static

B.
default/enterprise_reward/general/expiry with a value of static

C.
default/reward_points/general/expiry_calculation with a value of static

D.
default/enterprise_reward/expiry_calculation with a value of static