Read these lines from "O Captain! My Captain!".

O Captain! my Captain! rise up and hear the bells;
Rise up – for you the flag is flung – for you the bugle trills;
For you bouquets and ribbon'd wreaths – for you the shores a-crowding;
For you they call, the swaying mass, their eager faces turning;

What is the speaker referring to in these lines?

People on a boat are happy to be returning home from a trip.
The people of the country are celebrating Lincoln’s victory.
People are crowding the shore, waiting for a boat to dock.
A celebration is being held by the passengers of a ship.