Answer:
The answer is "Option d"
Step-by-step explanation:
The rule of thumb allows you to speak with 100 people in your competition for each important subset. It is a sample, that can't be trimmed for a smaller audience, in this process, the secondary data is used first then the primary data is used, and other choices, that can be listed as follows were wrong:
- Option a and option b is wrong because, the internal-external, and data internal primary isn't a part of this process.
- In option c, It is wrong because in this process first secondary data is used then primary data is used.
- In option e, The survey and report aren't used in this rule, that's why it is wrong.