Concept:Use the rules of signs for addition and subtraction of integers.Explanation:First, simplify −(−3).Subtracting a negative number is the same as adding its positive value.So, −(−3)=+3.Next, simplify +(−10).Adding a negative number means subtraction.So, +(−10)=−10.Now rewrite the expression: −13−(−3)+(−10)=−13+3−10.Combine step by step: −13+3=−10.Then, −10−10=−20.Thus, the simplified value is −20.Answer:−20, which is option B.