Which revision best corrects the errors in the given sentence? After the meeting this afternoon 1–2 P.M., we will know how many volunteers have signed up. A. After the meeting this afternoon (1–2 P.M.), we will know how many volunteers have signed up. B. After the meeting this afternoon—(1–2 P.M.), we will know how many volunteers have signed up. C. (After the meeting this afternoon 1–2 P.M.,) we will know how many volunteers have signed up.