Which of the Following Statements Are True of the Tissues

Which of the following statements are true of the tissues of the respiratory tract (Select all that apply) ?

A) The alveoli of the lungs are made of stratified squamous epithelium.
B) The trachea is kept open by fibrous connective tissue.
C) The bronchioles (airways) can constrict because of their elastic connective tissue.
D) The trachea is lined with ciliated epithelium.
E) Areolar connective tissue is found below the mucous membranes.
F) The cilia of the trachea sweep dust and mucus downward.