In the Odyssey, why does Eurycleia wash the feet of the beggar?

AThe beggar reminds her of Odysseus, and she suspects that it is him.
BThe beggar threatens to hurt her if she doesn't wash his feet.
CShe thinks that perhaps the beggar is her long-lost husband, Achilles.
DShe wants to impress Penelope with her kindness to the stranger.

Verified Answer :

In the Odyssey, Eurycleia washes the feet of the beggar because A) the beggar reminds her of Odysseus, and she suspects that it is him. 
In fact, it was him all along, pretending to be a beggar so that he could get closer to his wife Penelope.