Which one?.

d. Clock

Explanation:

A flip flop is an circuit, an electrical circuit precisely that is used as a means to story data or information. This type of data or information stored in a flip flop is binary data or information. A flip flop has a high stable state and a low stable state.

A flip flop is a circuit that is very essential and must be present when building systems like the computer or communication system.

A flip flop must have a CLOCK signal or indicator because this helps control the triggering(i.e the change from one state to another) that occurs in a flip flop.

assuming you are in the home page.

1) go to the upper right hand corner

2) click on your "profile picture"

3) go down to "edit profile"

4) it should be titled as "edit your profile", click on "profile picture"

5) choose a file

6) press "change"

you're profile picture is updated

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inventory equipment is 1st