Primary vs secondary research

primary research(ابحاث أولية) is about ......

Secondary research is about............

All these are ways of collecting information primary research (البحث الأولي) except.............

Primary research is done by the business itself.

Questionnaires and interviews conducted by the business itself are primary research.

Primary research is more reliable (موثوقة) than secondary research.

Secondary research is ...............

Data in secondary research is collected by....

In your opinion, which one is more accurate and reliable (صحيحة و موثوقة)

Primary research is preferable because it is.....

secondary research is.....

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