Which of the following sentences is written correctly?
a) Tanika Jones, who sits next to me in class, got a perfect score on her test.
b) Tanika Jones who sits next to me in class got a perfect score on her test.
c) Tanika Jones whom sits next to me in class got a perfect score on her test.
d) Tanika Jones, whom sits next to me in class, got a perfect score on her test.