<p>Not necessarily literature. The main idea is being able to understand what a text is talking about, no matter the content of the text. Taking AP Lang, reading with purpose (just being able to interpret the text as you read) etc… are all good. RC is a basic life skill, so it’s easy to develop.
Practice tests are very effective here: I believe that RC is the easiest to improve by brute practice and repetitive work.
Math, not so much-takes some development of ingenuity, and writing requires grammar rules, but RC, imo, requires mainly experience with reading.</p>