Which "awareness context" is characterized by the client, family, and health care professionals understanding that the client is dying, but all pretend otherwise?

This is referred to as the mutual pretense awareness. This is different from the open awareness where the patient, the family, and the health care professionals are aware that the patient is dying and open;y acknowledge that reality. There are four awareness contexts which includes; closed awareness, suspected awareness, mutual pretense awareness and open awareness. 

C14 dating since carbon is present in both living and no living objects .