Final answer:
Privileged motions are the correct answer to the question as they can interrupt other motions due to their urgency and importance in a deliberative assembly setting.
Step-by-step explanation:
The question relates to parliamentary procedure and the classification of motions in a deliberative assembly. The correct answer to the question "Motions are important issues allowing them to interrupt all other motions" is c) Privileged. Privileged motions are those that do not relate to the pending question but have urgency and importance such that they are allowed to interrupt the consideration of other matters.