Movement into and out of cells — practice question

Which statement describing a part of the gas exchange system is correct?

• Aalveolus: cartilage ✗, ciliated epithelium ✓, goblet cells ✗, smooth muscle ✗
• Bbronchus: cartilage ✓, ciliated epithelium ✓, goblet cells ✓, smooth muscle ✓
• Cbronchiole: cartilage ✗, ciliated epithelium ✓, goblet cells ✓, smooth muscle ✗
• Dtrachea: cartilage ✓, ciliated epithelium ✓, goblet cells ✓, smooth muscle ✗