Identify the sentence that is correctly punctuated.
Question 4 options:

a)

"Running the front line of the cafeteria isn't exactly rocket surgery" (sic), said Jerry.

b)

"Running the front line of the cafeteria isn't exactly rocket surgery" [sic], said Jerry.

c)

"Running the front line of the cafeteria, isn't exactly rocket surgery" [sic] said Jerry.

d)

"Running the front line of the cafeteria, isn't exactly rocket surgery," [sic] said Jerry.

I don't know what “sic” is even referring to let alone mean?