What is the main idea in this diary entry?

April 27

Wow! We’re getting a new Labrador puppy—temporarily. The puppy will be a part of our family, and we’ll spend a lot of time training him. But we won't be able to keep him, no matter how much we want to. That's because we're training him for the Hearing Ear Association.

A hearing ear dog assists a deaf person in much the same way that a seeing eye dog helps a blind person. It alerts its owner to important sounds, like a knock at the door, a morning alarm clock, or a whistling tea kettle.

Before the program places a dog with a deaf owner, the dog spends a year with a host family. That's us! Our first job is to get the puppy accustomed to family life and to teach it basic commands. We’ll teach it to sit and to fetch. Later, we’ll train the puppy in special hearing skills.

A representative of the Hearing Ear Association will deliver the puppy today. It's going to be an educational year for everyone!

A.
The writer is excited to get a new Labrador puppy as a pet.
B.
The writer's family will train a dog for the Hearing-Ear Association.
C.
The dog is a smart animal and learns about human habits quickly.
D.
The writer's family is against keeping a pet for more than a year.