John has been on the telephone for ten minutes. He has become increasingly loud and terminates the conversation by slamming the phone. He walks into the lounge and kicks a chair. The BEST nursing intervention for John would be to()

A．Respect John personal space and offer him one-to-one in a quiet area
B．Let J. know that continued agitation will result in restraints
C．Remove other patients and let John "blow off steam" in the lounge by himself
D．Immediately gather several staff to physically take J. to seclusion