You buy land in the tropics on steep mountain slopes covered by large trees and deep soil. You want to build a house on the land. Which of the following building plans is a not adviseable because of the danger of triggering mass wasting?
◦ Excavate a flat bench on the slope for the house, pushing the debris to the slope below and leave a cut bank above the flat bench with grass planted on the steep slope.
◦ Sell the land because it will always be prone to mass wasting.
◦ Excavate the soil from the building site, install drainage systems, and backfill with gravel to prevent water accumulation.
◦ Terrace the slope, building on the terraces, and constructing a rock retaining well with voids to allow drainage of water.