It's a system a letters that can be understood using touch. It is made for those with weak vision. This system can help blind people with understanding things from an elevator floor to a story book!
50 a
51 c
52 c
53 B
Those are correct
I think it is B:<span>social change affects personal identity</span>
A is the answer since it means if you don’t treat me well, I won’t treat you well
