Research Shows That If Broca's Area in the Brain Is

Multiple Choice

Research shows that if Broca's area in the brain is damaged, then speech production will be disturbed. An elderly man named Toben was referred to a neurologist because he began mumbling and speaking in a slow, halting manner. The neurologist told Toben's family that damage to Broca's area was causing the disturbance in Toben's speech. The neurologist's conclusion is NOT sound because:

A) the argument is valid and the premises are true.
B) both of the argument's antecedents are true.
C) the argument involves asserting the consequent.
D) both of the argument's premises are not true.