Answer:
A) There is no contract between Eckerly and Masse. However, if Masse would have mailed the acceptance on June 30, 2015, a contract would have been created.
Explanation:
If Masse would have mailed his acceptance of the offer instead of sending it with his private messenger, then it would be considered a valid acceptance and a contract would have been formed.
In contract law, the postal rule states that an acceptance to an offer can be sent through mail and the date of the acceptance is the date that it was mailed, not when it was delivered. This only applies to the acceptance of an offer, not to making the offer itself in the first place.