A general rule of thumb among marketing researchers is to use first and then collect . a. external secondary data; internal primary b. datainternal primary data; external primary datac. primary data; secondary datad. secondary data; primary datae. observational data; questionnaire data

The answer is "Option d"

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:

answer; (value inventories) are questionaires that you determine your personal values so that you can find a career that's in line with what you hold important;

i don't know to be honest but you on your own

step-by-step explanation:

ignitia made me retarted fool im stoopid laugh like shi

explanation:

i don't know to be honest but you on your own

step-by-step explanation:

ignitia made me retarted fool im stoopid laugh like shi