Final answer:
Weak bases are weak electrolytes because they partially dissociate into ions in water, unlike strong acids, strong bases, and completely soluble ionic compounds, which are all strong electrolytes.
Step-by-step explanation:
Among the given options, weak bases are generally weak electrolytes. Unlike strong acids and strong bases, which dissociate almost 100% into ions in an aqueous solution, weak bases only partially dissociate into ions when dissolved in water.
While completely soluble ionic compounds, and strong acids and bases are strong electrolytes, weak bases such as ammonia, do not dissociate completely and therefore are classified as weak electrolytes.