Which of the following best describes an "impetuous" person?

An impetuous person is characterized by acting quickly and without careful consideration or thought. This often leads to spontaneous and sometimes rash decisions. The emphasis is on the lack of forethought, meaning that an impetuous individual may not take the time to weigh the consequences of their actions or think through their choices in a deliberate manner. This impulsive behavior can result in actions that might be considered reckless or hasty.

In contrast, being cautious and calculating implies a thoughtful and deliberate approach, which is not consistent with the definition of impetuous. Being easily persuaded suggests a susceptibility to influence from others, rather than acting independently and impulsively. Lastly, a consistently calm demeanor would mean that a person is not acting in extreme or unplanned ways, which again diverges from the impulsive nature associated with being impetuous. Therefore, the definition aligns most closely with the idea of acting without forethought.