The correct answer is: A. boldness.
Timidity is a lack of courage or confidence. It is the opposite of boldness. When someone is timid, they are afraid to take risks or to stand up for themselves. This can often lead to them making poor decisions or missing out on opportunities. In the case of the question, the person’s timidity proved to be costly because it prevented them from taking action that could have benefited them.
Boldness, on the other hand, is the quality of being brave or daring. It is the opposite of timidity. When someone is bold, they are not afraid to take risks or to stand up for themselves. This can often lead them to make good decisions and to achieve their goals. In the case of the question, if the person had been bolder, they may have been able to avoid the costly mistake that they made.
The other options are not correct because they do not describe the quality of being timid. Arrogance is the quality of being excessively proud or self-important. Self-assertion is the act of expressing one’s opinions or feelings in a confident and forceful way. Self-confidence is the belief in one’s own abilities and qualities.