Step 1: About Mahāsāṅghikas.
Mahāsāṅghika was an ancient Buddhist sect considered more liberal and inclusive than Theravāda.
Their doctrines emphasized the Buddha's extraordinary powers and divine nature.
Step 2: Concept of “Lokottara”.
According to Mahāsāṅghika, the Buddha was not merely human but "Lokottara," meaning above the world.
For them, the Buddha was a divine being who appeared for the benefit of all sentient beings.
Step 3: Acceptability.
This doctrine that the Buddha is Lokottara was accepted by many sects because considering the Buddha merely an "ultimate human" did not fully support their scriptures and powers.
Step 4: Analysis of options.
(1) Condemnation of ignorance: A general principle, not specific to Mahāsāṅghika.
(2) Buddha is Lokottara: Absolutely correct, this was their main and distinctive tenet.
(3) Buddha was only best human: Incorrect, this is closer to Theravāda doctrine.
(4) Cessation of Suffering: A general Buddhist principle, not specific to Mahāsāṅghika.
Step 5: Conclusion.
The correct answer to this question is—considering the Buddha as Lokottara.