Which two lines in this excerpt from edgar allan poe the raven show the use of flashback

once upon a midnight dreary while i pondered weak and weary

while i nodded nearly napping suddenly there came a tapping

ah distinctly remember it was in the bleak december

eagerly i wished the morrow vainly i had sought to borrow

nameless here evermore

Ah, distinctly I remember it was in the bleak December;

And each separate dying ember wrought its ghost upon the floor.

   Eagerly I wished the morrow;—vainly I had sought to borrow

   From my books surcease of sorrow—sorrow for the lost Lenore—

For the rare and radiant maiden whom the angels name Lenore—

           Nameless here for evermore

the third paragraph is the the soltion or ending of a story

the correct answer is option d. none of these. it is noted that options a, b, and c share the same content.

despite the valid answer provided at the last sentence of each of the options, a question/answer format shouldn't include humourous themed responses such as "you bet your thermal pj's we do." - unless of course, the answer is carried out in an informal environment. this could be replaced with a simple "yes" or "it is necessary".

the question should be re-phrased to a more appropiate syntaxis. instead of "do we need the greenhouse effect? ", it should be written as "is the greenhouse effect necessary? " in order to give it a general scope, instead of limiting the answer to the needs of "we" the humans.