Jacob has $1,000 in a checking account and withdraws $40 each week. His account requires a minimum balance of more than $400. Write an inequality to model the number of weeks, x, that he can withdraw $40 to maintain the minimum balance requirement.

A.
x ≤ 18
B.
x > 15
C.
x < 15
D.
x < 18

D. x < 18