The effects of taking hallucinogens accompanied by feelings that objects are changing size, that other people are distorted, and that one might be mechanical is MOST similar to:

A) depersonalization.
B) multiple personalities.
C) amnestic fugue.
D) body dysmorphic disorder.

Depersonalization involves an alteration in the perception or experience of the self and the environment, which can include feelings of unreality or detachment from oneself or one's surroundings. The effects of taking hallucinogens, such as perceiving objects changing size or people appearing distorted, align with the symptoms of depersonalization, where there's a disconnection or estrangement from one's own body, thoughts, or identity.