You watched online as Dr. Alley carved a sand canyon with his finger. Based on what you saw, and on what you know about slopes, stability, mass movement, etc., if a landslide happened someplace last week, you would tell the neighbors:a) all is safe now ; nature relives stress and removes instabilities, and that is what the landslide did. b) run for your lives, landslides are always followed by floods and more landslides. c) care is required, landslides are removing instabilities and moving things towards stability, but a secong landslide, or a flood, or other problems are real possibilities. d) run for your video camers! landslides are invariably followed by professors sticking out fingers, and you can get footage to win megabucks on america's most funniest classrooms videos. e) special care is required; landslides invariably trigger earthquakes