Which is the BEST statement about joint flexibility? A. It is constant for any joint type.
B. It is constant within a family.
C. It is consistent between an individual's joints.
D. It varies from joint to joint.
PLS HELP!

Example of health promoting behavior

Group of genes that encode molecules found in all body cells, creating a biochemical “fingerprint” that serves as the “id” for cells so that they are marked as “self” a) deoxyribonucleic acid (dna) b) entry inhibitors c) major histocompatibility complex (mhc) d) non-nucleoside reverse transcription inhibitors (nnrtis)

Discuss how seniors can combat health problems they may face.