Penelope has been drinking coffee for the past 10 years.She says she needs the caffeine just to get through the day.Today,she has not had any coffee and has a severe headache,fatigue,and shakiness.Penelope is most likely ________ dependent on caffeine.

A) psychologically
B) socially
C) behaviorally
D) physically

Physically Dependent

A physiological state of adaptation to a substance, leading to withdrawal symptoms when that substance is no longer ingested.

Caffeine

A stimulant found in coffee, tea, chocolate, and certain soft drinks, known for its ability to increase alertness and reduce fatigue.

Shakiness

The sensation or visible sign of trembling, often resulting from anxiety, weakness, or illness.