What theme reflects a philosophical assumption held by Charlotte Brontë as reflected in Jane Eyre?

The correct answer for this question is this one: "c. The importance of friendship cannot be underestimated." The theme that reflects a philosophical assumption held by Charlotte Brontë as reflected in Jane Eyre is t he importance of friendship cannot be underestimated.

Here are the following choices:

a. The passage of time heals all wounds.

b. The tenderness of youth is forgotten in later years.

c. The importance of friendship cannot be underestimated.

d. The abuse of power is wrong.

I believe the answer is: The passage of time heals all wounds.

Here is the line that she says when she's reminiscing about her experience nine years ago:

The gaping wound of my wrongs, too, was now quite healed; and the flame of resentment extinguished.

From the line, we can infer that time has healed the emotional wound from her regrets and hatred that she had for the people in her past.