During testing, the company's technical people observe how customers use the product, a practice that often exposes unanticipated problems of safety and servicing and alerts the company to customer training and servicing requirements.

During Consumer Testing or Comparative Testing, the company's technical people observe how customers use the product, a practice that often exposes unanticipated problems of safety and servicing and alerts the company to customer training and servicing requirements.

Beta testing

Explanation: Beta testing is a form of testing, after the alpha testing (involves a group of sophisticated users, usually internal users/employees of the company), in which a product approaching full functionality is made available to a limited audience of external users. Beta testing is carried out by real users of the product in a real world environment.

Here, customers are observed on how they use the product under testing which helps expose unanticipated problems bordering safety and servicing. If needed, the company is notified to customer training and servicing requirements. It helps to improve success of the upcoming product release to the market and often future product development is heavily influenced by beta testing outcomes. This it does by providing recommendations for product improvement from an integrated perspective of customers.

answer(b) revenue account which increases;