Answer:
endemic
indigenous
natural
constitutional
essential
fundamental
natal
original
real
wild
built-in
congenital
connate
connatural
genuine
hereditary
implanted
inborn
inbred
ingrained
inherited
instinctive
intrinsic
inveterate
inwrought
unacquired
Explanation:
I believe it's B: To persuade his audience to trust him.
