If Marty doesn't drink caffeinated sodas daily, he experiences severe headaches. Marty is most clearly showing signs ofA.) a hypnagogic stateB.) toleranceC.) dissociationD.) physical dependenceE.) psychological dependence

e. physical dependence

Explanation:

Physical dependence -

It is the condition, when prolonged use of a certain drug or drink causes addiction for the drug and develops certain physical symptoms, is referred to as physical dependence.

The initial stage of physical dependence starts with very low dose or these drugs.

Hence, from the given scenario of the question,

Marty develops physical dependence for caffeinated sodas, and when he does not take one, he experiences severe headache.