Option b is the correct answer. Firuz Tughluq, implemented measures aimed at enhancing the quality of cultivation and improving crop yields, particularly focusing on fruit. He initiated the planting of around 1,200 fruit gardens, with the objective of boosting the agricultural output and subsequently increasing the revenue for the sultanate. Additionally, Firuz Tughluq's policies aimed to protect the interests of peasants, including raising officials' salaries and granting them Jagirs to prevent oppression of the rural population. This approach contributed to stabilizing prices and relieving the population from the burdens faced during the rule of previous rulers.