In one day, Al's Furniture can make $3$ tables or $4$ chairs, whereas BIG Furniture Warehouse can make $20$ tables or $30$ chairs. Match the concept to the corresponding description.

Al's can make tables at a lower opportunity cost than BIG.

BIG can make more tables than Al's.

For BIG to make more tables, it has to make fewer chairs.

BIG and Al's could both benefit if they coordinated their production efforts.