With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: Following the start of the Arab Spring in 2011, Gaddafi spoke out in favour of Tunisian President Zine El Abidine Ben Ali, then threatened by the Tunisian Revolution. He suggested that Tunisia's people would be satisfied if Ben Ali introduced a "Jamahiriyah" system there. Fearing domestic protest, Libya's government implemented preventive measures by reducing food prices, purging the army leadership of potential defectors, and releasing several Islamist prisoners. This proved somewhat fruitful at the time, as on 17 February 2011 while major protests broke out in other countries, the few scattered demonstrations against Gaddafi's government were feeble and ineffective. Unlike Tunisia or Egypt, Libya was largely religiously homogeneous and had no strong Islamist movement, but there was widespread dissatisfaction with the corruption and entrenched systems of patronage, while unemployment had reached around 30 per cent.
text_B: Knowing that Gaddafi was violently removed from power not long after the events in this passage, would political commentators likely have had to change their position on the effectiveness of his conciliatory measures, because what worked temporarily ultimately proved to be insufficient?
YES.