In part two of trifles, which of the following is an example of dramatic irony?

The men believe the women are incapable of discovering anything of substance when, in fact, they are the ones who discover evidence.

onto a large boat, and mark the water level that the boat sinks to. then, take the elephant out and put a bunch of marked weights onto the boat until it reaches the same water level. add up the masses of the weights to get the weight of the elephant.