What tissues make up the walls of a trachea and an alveolus?
- ATrachea: epithelium with goblet cells ✓, smooth muscle ✓; Alveolus: epithelium with goblet cells ✗, smooth muscle ✗
- BTrachea: epithelium with goblet cells ✓, smooth muscle ✓; Alveolus: epithelium with goblet cells ✗, smooth muscle ✓
- CTrachea: epithelium with goblet cells ✓, smooth muscle ✗; Alveolus: epithelium with goblet cells ✓, smooth muscle ✓
- DTrachea: epithelium with goblet cells ✗, smooth muscle ✓; Alveolus: epithelium with goblet cells ✗, smooth muscle ✗