Which extended metaphor does whitman use throughout "o captain! my captain! ? " whitman compares lincoln to a ship captain. whitman compares lincoln to a passenger. whitman compares lincoln to another president. whitman compares lincoln to a crew member.

Whitman compares Lincoln to a ship captain.

Throughout the poem, Whitman compares the United States to a ship and compares Lincoln to a ship's captain. He describes the emotions of the people after Lincoln's assassination. He uses the lines "Where on the deck my Captain lies", "For you they call, the swaying mass, their eager faces turning", and "My Captain does not answer, his lips are pale and still". 

By by showing how hard it was for the sisters to feign grief

B. alice is pretending there is a way through the glass when in reality that would not be physically possible therefore she has to pretend. but i think d is also possible because alice notices the glass is actually melting away which is also not possible either