The correct answer is: A. gentleness.
Humility is the quality of being modest and unassuming. It is the opposite of pride. Courage is the quality of being brave and facing danger or pain without being afraid.
Gentleness is the quality of being kind and considerate. It is the opposite of harshness. Honesty is the quality of being truthful and fair. It is the opposite of dishonesty. Determination is the quality of being firm in purpose and having a strong will. It is the opposite of indecisiveness. Pride is the quality of having or showing an excessively high opinion of oneself. It is the opposite of humility.
In the given question, the actor is well known both for his humility and courage. This means that he is a modest and unassuming person who is also brave and faces danger or pain without being afraid. This suggests that the actor is a gentle person.
The other options are not as relevant to the given question. For example, honesty is a good quality, but it is not as closely related to humility and courage as gentleness is. Determination is also a good quality, but it is not as closely related to humility and courage as gentleness is. Pride is not a good quality, and it is not as closely related to humility and courage as gentleness is.