A school club purchases sandwiches and pretzels for a lunch. Each sandwich costs $4.25 and each bag of pretzels costs $0.75. A total of 48 items (sandwiches and pretzels) were purchased for a total cost of $175. If s = the number of sandwiches and p = the number of pretzels, which system represents this situation?
A. s + p = 48
4.25s + 0.75p = 175
B. s + p = 175
4.25s + 0.75p = 48
C. s + p = 48
0.75s + 4.25p = 175
D. s - p = 48
4.25s + 0.75p = 175