"As more professional players used the bats, more autographed models were made."

Which of the following definitions of the word model is being used in the above sentence?

1. A person or thing that serves as a subject for an artist, sculptor, author, etc.

2. A style or design of a particular product

3. A person employed to wear clothing or pose with a product for purposes of display and advertising.

4. A representation, generally in miniature, to show the construction or appearance of something.

Definition #1

Definition #2

Definition #3

Definition #4