Which behaviour would not be considered professional?

Correct answer: Being late repeatedly without reason

The direct answer is D: being late repeatedly without reason. Professional behaviour means acting responsibly and reliably in a workplace or work-related situation. Reaching on time shows punctuality and respect for other people’s schedules. Completing work shows responsibility. Honesty builds trust and makes cooperation safer. Repeated unexplained lateness causes delay, burdens colleagues and suggests that the person is not respecting work commitments. Therefore D is the behaviour that is not professional. Option A is wrong as a choice because punctual arrival is a professional quality. Option B is wrong because completing assigned work is expected professional conduct. Option C is wrong because honesty is an important ethical quality. Option D is correct because the problem is both repetition and lack of a valid reason; an occasional unavoidable delay, communicated properly, is different. A useful memory line is: professional work is timely, responsible, honest and dependable.