Charlotte looks up a phone number on the internet and says the number three times to herself. as she reaches for her phone to dial the number, she is distracted by noise coming from outside her office. when the noise ceases after about 30 seconds, she picks up the phone but finds that she cannot remember the number. this is due to the limits of memory.

Short-term memory

Explanation:

The short-term memory it is called also primary or active memory. The things that are stored are mostly recent events and sensorial data, for examples, sounds are stored in this kind of memory. It refers to what we are currently thinking or that we are aware of.

The ability of the brain to store this kind of memory item is more limited, short term memory takes part on the frontal lobe of the cerebral cortet.

So the answer to the question is: short-term memory because Charlotte looked for a phone number on the Internet so it is a recent event and it is something that Charlotte is currently thinking due to the reception of new information.