By showing the soundness of his argument through a number of analogies
"A" seems to be the correct answer.
ddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd
It is not A because Nonverbal means that no speech is used.
Its not B because a metaphor is a figure of speech and your seriously asking for an Allownace.
It is not C because a Rhetoric question is one that isn't supposed to be answered.
so it must be D
