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.