A Chemist Is Planning to Study a Chemical Equilibrium for Which

A chemist is planning to study a chemical equilibrium for which no measured explicit thermodynamic values are available.However,the reaction involves common chemical species.What information could a chemist use to make predictions about the equilibrium?

A) "equilibrium constants for the equilibrium reactions that can be combined to make the new equilibrium"
B) " values for the reactants and products of the new reaction"
C) " $\Delta$ H_f and S ^$\circ$ values for the reactants and products of the new reaction"
D) "only b and c"
E) "all of the above"