Which of the Following Probabilities for the Sample Points $A , B$

Multiple Choice

Which of the following probabilities for the sample points $A , B$ , and $C$ could be true if $A , B$ , and $C$ are the only sample points in an experiment?

A) $\mathrm { P } ( \mathrm { A } ) = 0 , \mathrm { P } ( \mathrm { B } ) = 1 / 2 , \mathrm { P } ( \mathrm { C } ) = 1 / 2$
B) $\mathrm { P } ( \mathrm { A } ) = 1 / 2 , \mathrm { P } ( \mathrm { B } ) = 1 / 6 , \mathrm { P } ( \mathrm { C } ) = 1 / 7$
C) $\mathrm { P } ( \mathrm { A } ) = - 1 / 4 , \mathrm { P } ( \mathrm { B } ) = 1 / 2 , \mathrm { P } ( \mathrm { C } ) = 3 / 4$
D) $\mathrm { P } ( \mathrm { A } ) = 1 / 9 , \mathrm { P } ( \mathrm { B } ) = 1 / 9 , \mathrm { P } ( \mathrm { C } ) = 1 / 9$