Which lines from "in flanders field" best express the theme of the poem?

"we are the dead"

"if ye break faith with us who die/we shall not sleep"

"in flanders fields the poppies blow / between the crosses, row on row"

"the larks still bravely singing, fly / scarce heard amid the guns below."

The answer would be the first choice “"We are the dead"   Flounders Fields was a place in France where many soldiers were buried during the World War I.  After the war, poppy flowers grew on top of the graves of the fallen soldiers. Many people believed that these poppies symbolize the brave man who has died to protect their country.

Yeah, i believe the answer is b and c