The Second Presupposition of the Practice of Argument Making Is

The second presupposition of the practice of argument making is the hypothetical that __________.

A) the speaker's reason, if true, is the logical basis for the speaker's claim
B) the listener's attention, if focused, will agree with what the speaker is saying
C) the speaker's claim, if false, will be rejected by the listener
D) the listener's response, if measured, will be to judge the argument sound