Read the excerpt from act iv of hamlet.
how does gertrude’s reaction advance the plot of the play?
by introducing her maternal kindness toward ophelia
by resolving readers’ concerns about ophelia’s madness
by reaching a height of conflict as gertrude decides to punish ophelia
by suggesting that ophelia’s madness is a sign of greater troubles

Gertrude’s reaction advance the plot of the play BY SUGGESTING THAT OPHELIA'S MADNESS IS A SIGN OF GREATER TROUBLES.

In fact, before the end of Act IV of Hamlet, Ophelia did meet great trouble. She drowned and died. She fell into the river but kept on singing instead of shouting for help. Her clothes grew heavy with water and it pulled her down the river and caused her to drown. 

Kthen, just here for points