**Answer:**

4. **C****.**

5. **B****.**** ****s****y****m****m****e****t****r****i****c** since bawal namn yung reflexive

pag “additive” dapat yung equation laging sagot is **0****.**

Ex: 5 + -5 = 0

-5 + 5 = 0

pag “multiplicative” dapat yung answer pareho kahit pag baliktarin yung mga number.

Ex: 3 × 5 = 15

5 × 3 = 15