Which type of market research is data that an entrepreneur collects himself or herself; for example, from a survey of potential customers, and then analyzes?

Primary Research Data.

Explanation:

Entrepreneur can collect the primary data by themselves. They can collect in numerous available methods and options. They can collect it either with the help of questionnaires or by taking interviews. Many more options like open ended questionnaires or close ended questionnaires then can be opted accordingly. Likewise, in-depth interviews can be conducted to collect more valuable insights about the customers which definitely can be very helpful fo the entrepreneurs in order to make strategical and tactical level decisions quite effectively.

answer; i believe that the correct answer is (d)when the products are consumed or