What has been the primary change in retailing over the years?

The primary changes were in the tank companies, which were reduced to three.

The primary changes came into effect on 27 March 2006.

The primary changes to the 1972 Cutlass were the front grilles and the tail lights.

A new grille with vertical grating was the primary change.

The primary changes are within the library interior.

What is the primary change in the field since then?

The primary change in courtship rituals during this time was a shift from marriage to social status as the desired result.

The primary change brought by the creation of the game preserve was to ban deer hunting.