Final answer:
The term sacerdotal refers to activities that are priestly, such as administering sacraments and conducting religious rituals.
Step-by-step explanation:
The term sacerdotal refers to activities that are priestly. In the context of the district council supervising ecclesial and sacerdotal activities, it means that the council oversees tasks and responsibilities that pertain to priests. These activities may include administering sacraments, conducting religious rituals, and performing liturgical duties. Therefore, the correct answer is option a) priestly.