Write the next sentence in the following story.

How to write a marketing report
Consider why you should perform market research and write a report.
What information is important to you? What will you do with the marketing report after it is created? This process requires an investment of time and expense. Make sure that you have a clear plan for using the information that you collect.

Pick from: a. Marketing is a complex industry, and you have to take two choices when trying to generate a market report. One option is to put the data in an open container and keep it sealed.. b. Before embarking on any kind of data, consider what the research is going to be used for. For example, you might focus on nutritional and environmental research related to building bridges in poverty-reducing regions.. c. Research companies have specialist research company administrators and workforce field specialists. Talk to these specialists to find out what problems to address.. d. Market research is the process of evaluating how well your marketing efforts are working. Specifically, does your marketing get the attention and interest of prospects? Are you converting enough of those prospects into clients? Identify your customer... The answer should be
d.