Final answer:
To assess the effect of temperature on the equilibrium of AgBr in solution, the temperature coefficient for AgBr dissolution is the necessary information. The correct option is b.
Step-by-step explanation:
To answer the question of how the equilibrium of solid silver bromide (AgBr) with a saturated solution of its ions is affected when the temperature is raised, we need the temperature coefficient for AgBr dissolution. This coefficient indicates whether the dissolution of AgBr is endothermic or exothermic. If it is endothermic, the solubility of AgBr will increase with temperature according to Le Chatelier's principle.
None of the other options provided will directly answer the question regarding changes in equilibrium due to temperature change. Hence, Option b is correct.