The correct option is A) The sirens are trying to lure Odysseus to their island. Their strategy is using the words: "We know all the pains that the Greeks and Trojans once endured on the spreading plain of Troy when the gods willed it so— all that comes to pass on the fertile earth, we know it all!".
In Odyssey, the sirens and their singing is dangerous. They seek to trick sailors and drive them to death. When Odysseus and his men are near the island of the sirens, he follows Circe's advice and orders his men to cover their ears in order not to hear the singing. Moreover, he tells them to tie him to a mast. Although Odysseus is slightly compelled by the sirens' singing, he becomes aware of the danger they pose and; therefore, he and his men are able to continue their journey.
