Of the "big five" personality factors, which trait can be best described as careful versus careless?

Openness to experience - (inventive/curious vs. consistent/cautious). Appreciation for art, emotion, adventure, unusual ideas, curiosity, and variety of experience. Conscientiousness - (efficient/organized vs. easy-going/careless). A tendency to show self-discipline, act dutifully, and aim for achievement; planned rather than spontaneous behaviour. Extraversion - (outgoing/energetic vs. solitary/reserved). Energy, positive emotions, urgency, and the tendency to seek stimulation in the company of others. Agreeableness - (friendly/compassionate vs. cold/unkind). A tendency to be compassionate and cooperative rather than suspicious and antagonistic towards others. Neuroticism - (sensitive/nervous vs. secure/confident). A tendency to experience unpleasant emotions easily, such as anger, anxiety, depression, or vulnerability.