Is usually voluntary while is assigned by others. a. group affiliation, stratification b. status, group affiliation c. startification, group affiliation d. group affiliation, status

The correct answer here is D.

In most cases, like almost all cases, group affiliation is voluntary and the individual voluntarily becomes a part of the group. Status on the other hand is largely assigned by others as status is defined as the relative respect/competence that is assigned and according to other people and members of the society.  

A military force is a professional organization in which they are their to protect their country. They are authorized to use deadly weapons like bombs, grenades, and other sorts to protect their country at all cost