What is the primary characteristic of someone who is "assiduous" in their work?

Being "assiduous" in one's work primarily means demonstrating persistent effort and care. This term reflects a diligent attitude where an individual takes their tasks seriously, consistently dedicating time and energy to ensure that the work is performed thoroughly and with attention to detail. This unwavering commitment sets assiduous individuals apart, as they often stand out for their reliability and conscientiousness in completing tasks effectively.

In contrast, the other options indicate behaviors that do not align with the essence of being assiduous. Working sporadically suggests inconsistency, while avoiding responsibilities demonstrates a lack of engagement or commitment. Focusing on quantity over quality implies a disregard for the care that is essential in assiduous work. Thus, the key attribute of an assiduous worker is the dedication to sustained effort and meticulousness in their endeavors.