A package named store-domain has src/lib.rs and src/main.rs. From main.rs, how should the…

A package named store-domain has src/lib.rs and src/main.rs. From main.rs, how should the binary normally import Product exposed by the library root?

1. use store_domain::Product;
2. use crate::Product;
3. use src::lib::Product;
4. mod lib; use lib::Product;