I would say the main idea is A.
B, C, and D are all mentioned in the passage, but the text as a whole is about how important water level is in the car battery.
Hope this helps.
I think it is d. if i'm wrong please tell me.<span />
Answer:
She developed hand gestures, to me it was almost a simpler version of sign language.
Explanation:
By age 7, Keller had developed nearly 60 hand gestures to communicate with her parents and ask for things. However, she was often frustrated by her inability to express herself. With the help of her teacher, Anne Sullivan, Keller learned the manual alphabet and could communicate by finger spelling.
