Answer:
B) Charlie's level of intelligence limits his ability to understand people and events.
Step-by-step explanation:
Charlie's handicap limits his perception of everything around him. As his intellectual capacity is very low, this is totally different from the reader's ability to interpret and understand the events and people with whom Charlie lives. Although the reader can understand them, Charlie cannot, because he sees everything in a very innocent and childlike way, without the ability to interpret and reason.