The correct option is A Disciplined
Synonyms are words which have the same or nearly the same meaning in the same language.Option A) disciplined is correct as it means showing a controlled form of behaviour or way of working. The other options are wrong as austere, artificial, and pompous mean severe or strict in manner or attitude,made or produced by human beings rather than occurring naturally, especially as a copy of something natural, and affectedly grand, solemn, or self-important respectively. The correct answer is A) disciplined.