The true statement about the Four Ps is:
Each of the Four Ps contributes to a whole marketing strategy.
This statement reflects the idea that Product, Price, Place, and Promotion work together to create a cohesive marketing strategy. The other statements have inaccuracies: the Price decision is often considered in relation to the Product and Place decisions, not necessarily first; all four elements are usually relevant in a marketing mix; and while the Product decision is important, it is not necessarily the most important for all consumer products, as it depends on the specific context and market.