Identify the sentence that uses commas correctly.

A) The punctuation I struggle with the most is using too many commas and leaving out quotation marks yet I always get A's.
B) The punctuation I struggle with the most is using too many commas and leaving out quotation marks, yet I always get A's.
C) The punctuation I struggle with the most, is using too many commas and leaving out quotation marks yet I always get A's.
D) The punctuation I struggle with the most, is using too many commas, and leaving out quotation marks, yet I always get A's.