What role did Buddhists play in the Tang dynasty's economy? Monks collected funds from the peasants for the dynasty. They donated land to the dynasty to add to the equal-field system. Buddhist groups made large donations to the dynasty's treasury. Monasteries paid higher taxes than the average peasant.
"Monasteries paid higher taxes than the average peasant" would be the best option from the list, since this group was especially discriminated against, especially economically.