After a fire in a hillside area, experts say residents should be on the watch for landslides/debris flows after it rains. Why?

A) The fire has killed all of the vegetation, which can destabilize the slope and increase the risk of debris flows.
B) The dead vegetation and exposed soil can soak up the rain, preventing a debris flow.
C) Extra water can add weight to the slope, stabilizing it.
D) The dead vegetation and exposed soil can mix with the rain, causing a debris flow.
E) The fire has killed all of the vegetation, which can stabilize the slope and prevent debris flows.