An extended argument is a chain of arguments or an argument where support is given for the premises of an argument. The following argument is an extended argument. Which sentence is both a premise and a conclusion?

Accepting a gift from one of the bidders on a project is both within the law and within ACME's code. However, in this case the clear message of the gift was obviously meant to $($and did$)$ influence the bid. So$,$ it was obvious that you should not have accepted this gift. Since, it was obvious that you shouldn't have accepted the gift but you did anyhow, we believe it would be appropriate for you to donate an equivalent amount to the charity of your choice.

Select one:

a$.$ We believe it would be appropriate for you to donate an equivalent amount to the charity of your choice.

b$.$ In this case the clear message of the gift was obviously meant to $($and did$)$ influence the bid.

C$.$ Accepting a gift from one of the bidders on a project is both within the law and within ACME's code.

d$.$ It was obvious that you should not have accepted this gift.