D . A cube that is 1 inch long , 1inch wide and 1 inch high .

Answer
its a cube whose side is 1 unit long .
And total surface area should be 6 square units .
as we can see
5 3/8 rounds to 5,
4 7/10 rounds to 5
Your estimated sum is 10
No one is going to be a great way to start a