Simplify this expression
1 + 4.25n + 3/2 p - 3 + (-2p) + 5/4 n
A. 5.5n - 1/2 p - 2
B. 9.5n + 1.5p - 2
C. 9/4 n - 1.5p - 4
D. 3.75n - p + 1
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