Which sentence does not contain any errors in comma usage?
a.
have you seen, carrie my cousin, from pittsburgh?
b.
my next-door neighbor walt, is also an excellent climber.
c.
mrs. walters, the new librarian, is from arizona.
d.
california the most populous u. s. state, was once part of mexico.

a. all of the other answers have at least one capitalization error.

the personification of the word prudence d) it effectively enhances the logos and ethos of the argument.

logos means appeal to the logic or reasoning of the people.

ethos means appeal to the credibility of the argument, that it is worth listening to and acting upon.