Answer: d. opened more public lands in four years than Roosevelt had marked for conservation in nearly eight.
Step-by-step explanation:
Under Roosevelt´s administration, many policies aimed to help the conservation of natural resources were established, such as the establishment of national forest lands, the public domain of hydroelectric power sites and coal or oil reserves, and the enlargement of the national park system.
William Howard Taft kept some of Roosevelt´s progressive ideas, but he removed forest and mining lands form the reserved list.