With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: As his sons had desired and planned, Wilberforce has long been viewed as a Christian hero, a statesman-saint held up as a role model for putting his faith into action. More broadly, he has also been described as a humanitarian reformer who contributed significantly to reshaping the political and social attitudes of the time by promoting concepts of social responsibility and action. In the 1940s, the role of Wilberforce and the Clapham Sect in abolition stopped being downplayed, first by historian Eric Williams, who argued that abolition was motivated both by humanitarianism and by economics, as the West Indian sugar industry was in decline. Williams' approach strongly influenced historians for much of the latter part of the 20th century. However, more recent historians have noted that the sugar industry was still making large profits at the time of the abolition of the slave trade, and this has led to a renewed interest in Wilberforce and the Evangelicals, as well as a recognition of the anti-slavery movement as a prototype for subsequent humanitarian campaigns.
text_B: If you asked a historian in the early 20th century if Wilberforce and the Clapham Sect had played a large part in abolition, would they probably have said "No?"
YES.