3 Choose the correct answer Assertion: If you know the sum and one of the addends, you can find the missing addend Reason: Addition is commutative, which means you can add the numbers in any order. 1) Both A and R are true and R is the correct explanation of A. ii) Both A and R are true but R is NOT the correct explanation of A. iii) A is true but R is false. iv) A is false but R is true.​