costa and mccrae's model of personality, which includes dimensions like conscientiousness, neuroticism, and openness to experience, is commonly referred to as the model.

The correct answer is five-factor model.
Five-factor model (FFM) refers to using particular descriptors when it comes to explaining someone's personality. According to this model, there are five types of personality, which are mentioned in your question above. Those who are open to new experiences are inventive and curious; those who are conscientious are efficient and organized; those who are extraverted are outgoing and energetic; those who are agreeable are friendly and compassionate; those who are neurotic are sensitive and nervous. 

Ibelieve that the answer is (a).