Concept:Use the rules of signs for addition and subtraction of integers.Explanation:Subtracting a negative number is the same as adding its positive value.So, 53−(−7)=53+7.Adding a negative number is the same as subtracting its positive value.So, +(−15)=−15.Now simplify:53+7−15=60−1560−15=45Therefore, the value of the expression is 45.This matches option B.Answer:45 Option B.