158. When the U.S. Army advertises “Be All You Can Be Join the Army ” which of the three primary advertising objectives are they primarily pursuing? 159. During the period 1920-1950 what changes in the United States contributed to the shift from a production orientation to a sales orientation? 160. When assessing customer value what must a marketer always remember? 161. Basically there are two ways to improve value. What are they? 162. Why do marketers have to constantly re-evaluate their value propositions?