Aprimary characteristic of wernicke's aphasia is select one: a. fumbling for the right word. b. labored and nonfluent speech. c. speech that lacks rhythm and tone. d. mutism. e. effortless production of meaningless speech.

I believe the correct answer is: e. effortless production of meaningless speech.

A primary characteristic of Wernicke's aphasia is effortless production of meaningless speech, while speech retains a natural-sounding rhythm and a relatively normal syntax. This condition is caused due to the injury on Wernicke's area, a link between the left posterior section of the superior temporal gyrus and the reflexive mimicking of words and their syllables that associated the sensory and motor images of spoken words.

good question. i'll be looking into that. (this is a joke sir)