Answer:
In "A Doll's House," by Henrik Ibsen, Nora asks for the lamp, whose artificial light suggests that secrets are being revealed. For instance, Dr Rank's feelings for Nora should have been kept undisclosed, since she is a married woman. Consequently, truth and light are closely related in the novel, in which the characters possess confidential matters hidden that are eventually exposed.
I would say:
<span>C.
present participle
I could be wrong though</span>