C, put a comma after every item in the series except the one that comes just before those words
Answer:
By sharing a hypothetical story as an example of the subject.
Explanation:
In these lines, we see that the author is sharing a hypothetical scenario where a girl named Alice is having a party. This girl delivers her invitations in two different ways: ordinarily and digitally. The outcome in both cases is quite different. The author uses this examples in order to show how the two types of mail can differ significantly.
Legal contracts provide incentives for people to exchange goods and services by allowing fair trade and consequences to come into effect if one party doesn't meet the legality of the contract. Both parties of the exchange are given guidelines to follow as well as the rewards and ramifications of certain actions.
I hope this helps!