Answer
(a) Less products.
(b) More products.
(c) More products.
(d) Less products.
Work Step by Step
Increasing the temperature favors the endothermic reactions (with positive $\Delta H^o_{rxn}$), and decreasing it favors the exothermic reactions (negative $\Delta H^o_{rxn}$).
Therefore: if the forward reaction is endothermic, increasing the temperature favors products, if it is exothermic, increasing the temperature favors reactants.
(a) Negative: Exothermic: Favors Reactants: Less products.
(b) Positive: Endothermic: Favors Products: More products.
(c) Endothermic: More products.
(d) Exothermic: Less products.