Answer: b. Yes, because Trista dispatched the telegram prior to 2:00 p.m.
Explanation:
Sometime internet connection and strength do have a role to play in messages being received and sent. When two individuals are communicating and they have an agreement, although they agree at a time but the communication cannot be really confirmed until both parties have seen the message they both sent to each other. This is the case with Trista and Charlie homes, she sent her mage at the agreed time but network connectivity didn't show on the recipient side that she did.