Andrea's rock collection has 25 fewer rocks than claudia's collection. andrea's collection contains 125 rocks. which equation can be used to calculate how many rocks are in claudia's collection? let the variable r stand for the number of rocks in claudia's collection.

a.125 = r -25

b.125 -25 = r

c.25 - r =125

d.125 = r + 25

i need the answer asap

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