Luca is in finance and likes to stretch the payments towards his bill just before the due dates to not incur interest charges or late payment fees. He gets a kick out of doing this. Luca$$s credit card billing period ends on the $10$th of every month. The grace period is $20$ days. During what period of time will he receive free credit for a purchase made on July $25?$

Question $29$Select one:

a$.$

$41$ days

b$.$

$32$ days

c$.$

$36$ days

d$.$

$28$ days