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On the number line shown above, the tick marks are equally spaced. Which of the following statements about the numbers x, y and z must be true?

A. xyz <0

B. x+z = y

C. z(y-x) > 0

Greg said all three are tru but if you go with fractions eg. x= -1/2, y= 1/2, z=1/4,

the B can not be true as x+z= -1/2 + 1/4 = -1/4 which does not equal to y=1/2

Am I missing something? Thanks