Which of the following is true of the implications and use of the Lisbon Treaty?
a. Citizen initiatives launched by grass-roots campaigns have met with more success than failure.
b. The European Union (EU) should seek to forge decision-making at the level of the lowest effective jurisdiction.
c. National parliaments overuse the provision to signal violation of their subsidiarity by EU legislative proposals.
d. Under the citizen initiative procedure, any group of at least 100 member-state citizens can petition EU institutions.