Mason opens a savings account by making a $165.85 deposit. Every week, he deposits another $20.50 in the account.

Write an expression that shows the amount of money that will be in the account x weeks after Mason opens it.
A : 165.85x + 20.5
B :165.85 – 20.5x
C: 165.85 + 20.5 + x
D: 165.85 + 20.5x