请NN帮忙校对一下答案。GWD给定答案是 C，但这显然是B啊.

Q24:
At a certain company, each employee has a salary grade s that is at least 1 and at most 5. Each employee receives an hourly wage p, in dollars, determined by the formula p = 9.50 + 0.25(s – 1). An employee with a salary grade of 5 receives how many more dollars per hour than an employee with a salary grade of 1?

A. $0.50

B. $1.00

C. $1.25

D. $1.50

E. $1.75

For

S=1, p=9.5+0.25x(1-1)=9.5

S=5, p=9.5+0.25x(5-1)=10.5

difference is 1. answer is B.