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Tina pet sits to earn extra money. She charges a flat service fee of $20, plus $15 per day. If one of her customers spent less than $95, which of the following inequalities could be used to solve for x, the number of days the customer paid for pet sitting?
A. $15x < $115
B. $15x - $20 < $95
C. $15x + $20 < $95
D. $15x < $95