Let x = a + bi and y = c + di and z = f + gi
Which statements are true? theres multiple answers

a. x + y = y + x

b. (x × y) × z = x × (y × z)

c. x – y = y – x

d. (x + y) + z = x + (y + z)

e. (x – y) – z = x – (y – z)