Answer:
B-struggling makes you appreciate 5he times when you are thriving
It appears he may have stopped writing in his diary due to becoming ill while stuck at sea and due to being too busy with amending the boat's structure at the time.
I am not sure if this is an accurate answer. But based on his history, it seems plausible.
Nick, owl eyes a few servants and Gatsby's father attended his funeral. This is significant because everybody "loved" him when he was alive but when he died nobody really cared. He never really had friends or people that truly loved him, just people who loved the mystery he held and fancy parties he threw.