Answer:
C. most generous and attractive
Step-by-step explanation:
A subjective phrase is one that is based or influenced on personal feelings, tastes, or opinions. There are two subjective phrases as options, "loads of fun with it" and "most generous and attractive." They are subjective because some people may have fun with it while others may not and because some people won't see the offer as the most generous or attractive. However, because we want a more formal tone, "most generous or attractive" is more accurate. You wouldn't say something was loads of fun at a formal gathering.