The Stages of the Business Buying Decision Process, in Order

The stages of the business buying decision process, in order, are:

A) recognising the problem, establishing product specifications, searching for products and evaluating possible suppliers, selecting suppliers and products and evaluating performance.
B) recognising the problem, searching for products and evaluating possible suppliers, selecting suppliers and products, establishing product specifications and evaluating performance.
C) recognising the problem, selecting suppliers and products, evaluating performance, establishing product specifications and searching for substitute products.
D) establishing product specifications, recognising the problem, searching for products, evaluating possible products and suppliers, selecting suppliers and products, and evaluating performance.
E) establishing product specifications, searching for products, selecting suppliers and products, evaluating performance, recognising the problem and evaluating possible products and suppliers.