Which details best support the claim that Keller learned to communicate successfully

Please mark as BRAINLIEST!!

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 fingerspelling.

Within a few months of working with Sullivan, Keller's vocabulary had increased to hundreds of words and simple sentences. Sullivan also taught Keller how to read braille and raised type, and to print block letters. By age 9, Keller began to learn to speak and read lips, skills she continued to develop throughout her lifetime

Mode means MOST.  Which number is displayed the most?

39, 43, 43, 50, 55, 61, 75, 78, 78, 78

78

Note: I placed the data set into numerical order because it will help you to easily find the mode and also the median (middle number).