Lana’s traits of being focused on achievement, self-disciplined, and keen to do his duty align with the personality trait of Conscientiousness. Conscientiousness is one of the Big Five personality traits, referring to being diligent, organized, and goal-oriented. Individuals who score high in conscientiousness are typically reliable, disciplined, and motivated.
Step 1: Analyze the options.
(A) Conscientiousness: This is the correct option because Lana exhibits behaviors related to achievement, discipline, and responsibility, all of which are core characteristics of conscientiousness.
(B) Neuroticism: Neuroticism involves emotional instability, anxiety, and moodiness, which does not align with Lana's described traits.
(C) Agreeableness: Agreeableness refers to being cooperative, empathetic, and helpful. While it is an important trait, it is not the most relevant to Lana's focus on achievement and self-discipline.
(D) Extraversion: Extraversion is characterized by sociability, enthusiasm, and assertiveness, which is not directly related to Lana's described traits.
Step 2: Conclusion.
Conscientiousness best describes Lana’s personality traits, making (A) the correct answer.
Final Answer:
\[
\boxed{(A) \, \text{Conscientiousness}}
\]