The noncommissioned officer and petty officer: backbone of the armed forces (2013) states that, "the officer-nco/po relationship is a sacred feature in the profession of arms. it is built on mutual recognition of their and a true appreciation of the contribution of each."

The correct answer is "edge and maturity level."

The Noncommissioned Officer and Petty Officer: the Backbone of the Armed Forces (2013) states that "the officer-NCO/PO relationship is a sacred feature in the profession of arms. it is built on mutual recognition of their age and maturity level, and a true appreciation of the contribution of each."

This is a book for military forces. It serves as an explanation of the duties, among other things, for the recently enlisted soldier and its service to the United States. It was written by a group of active and retired seniors of the Army, the Navy, and the Air Force. The book explains how NCO/PO (non commissioned officer/petty officer) has to do its duties, how they fit in the armed forces and its future international engagement.

Through the notes and explanations of former officers, the book serves as a referral for the life in the army and the profession in the armed forces serving the country.