下列各组中的物质，能在溶液中大量共存的是[ ]

A．KNO₃、NaCl、NaOH

B．KOH、Na₂CO₃、HCl

C．KNO₃、NaOH、FeC1₃

D．AgNO₃、BaCl₂、HNO₃

A psychotic client reports to the evening nurse that the day nurse put something suspicious in his water with his medication. The nurse replies, "You’re worried about your medication" The nurse’s communication is（）

A. an example of presenting reality.

B. reinforcing the client’s delusions.

C. focusing on emotional content.

D. a nontherapeutic technique called mind reading.