民间文化娱乐属于（）民俗。

A.经济

B.社会

C.精神

D.游艺

The nurse is caring for a client who has a tracheostomy tube and is undergoing mechanical ventilation. The nurse can help prevent tracheal dilation, a complication of tracheostomy tube placement, by

A．suctioning the tracheostomy tube frequently.

B．using a cuffed tracheostomy tube.

C．using the minimal air leak technique with cuff pressure less than 25 cmH₂O.

D．keeping the tracheostomy tube plugged.