The correct answer is B. Vulnerable.
A vulnerable person is open to injury or criticism. They may be easily hurt or offended, and they may not be able to handle difficult situations very well.
An invincible person is someone who cannot be injured or defeated. They are often seen as being very strong and powerful, and they may not be afraid of anything.
A naive person is someone who is innocent and trusting. They may not be aware of the dangers in the world, and they may be easily taken advantage of.
A sensitive person is someone who is easily affected by their surroundings. They may be easily hurt by words or actions, and they may be very emotional.
In the context of the question, the correct answer is B. Vulnerable. This is because a vulnerable person is open to injury or criticism. They may be easily hurt or offended, and they may not be able to handle difficult situations very well.