In operating systems the primary interface between the user and the rest of the system is its

Operating System

It is the interface between user (application programs) and hardware. It is a program that controls the execution of application programs and acts as an interface between the user of a computer and the computer hardware.

Explanation:

the answer would be 2

since they are only saying that the couple has 20 daughters and so on but they never said that they went to the movies as well therefore the couple was the only people that went to the movies.

hope this ! : 3