Good Readers monitor their own comprehension. rereading, reading ahead, asking questions, paraphrasing, seeking help and visualizing to help them understand what they are reading.
What was a great movie? - It.
Just ask this question and you can easily find the subject of a sentence. Here, it is the pronoun <u>it.</u>
C. The gills of a jack-o-lantern mushrooms give off a faint, glowing light.