What quality of a doll's house likely contributed to henrik ibsen becoming known as the father of modern drama?
a. its celebration of the triumph of the human spirit
b. its appeal to various sections of society
c. its unique and memorable antagonists
d. its way of challenging social norms

In my opinion, the correct answer is D. Because "A Doll's House" dealt with a woman who was missing her freedom, and is quite controversial because of her decision to leave everybody, even her children so that she could finally be free, this play was criticized a lot. It dealt with social norms, and what is right to do and what isn't. Ibsen exposed real social problems, but didn't really give any plausible solutions.

‘the resulting drop in pressure would be detected by the soviets.’