Ineed ! i'm stuck between c or d.

The diameter of a circular chip is doubled to use in a new board game. the area of the new chip will be

Can someone me and plz do the problem

The first week samantha learned to read braille, she could read 10 words per minute. in the second week she increased her speed by 20%. in the third week she increased her speed again by another 25%. how many words could she read per minute by the third week? hurry and tell me!