How can special knowledge in management develop?

Correct answer: Through education training research and experience

The direct answer is A, through education, training, research and experience. Special knowledge means organised understanding and practical ability needed to perform managerial work well. The reasoning is: education gives basic concepts; training develops usable skills; research provides updated and tested ideas; experience teaches how to apply knowledge in real situations. Therefore option A correctly includes the main routes of development. Option B, rumours, are unverified statements and cannot reliably create expertise. Option C, birth, may provide no managerial knowledge or skill; management ability is learned and developed. Option D, designation, only gives a title or position and does not automatically make a person competent. A good manager keeps learning because markets, laws, technology and stakeholder expectations change. Memory cue: learn it, practise it, test it and improve it—this is how professional knowledge grows.