"High said: There is a great deal to tell of it. There an eagle sits in the branches of the ash, and it has knowledge of many things, and between its eyes sits a hawk called Vedrfolnir. A squirrel called Ratatosk runs up and down through the ash and carries malicious messages between the eagle and Nidhogg. Four stags run the branches of the ash and feed on the foliage. Their names are Dain, Dvalin, Duneyr, Durathror. And there are so many snakes in Hvergelmir with Nidhogg that no tongue can enumerate them. As it says here:

The ash Yggdrasil suffers hardships more than people realize. Stags bite above, and at the sides it rots, Nighogg eats away at it below."
According to Norse mythology, what is the name of the eagle that sits in the branches of the ash tree Yggdrasil?
a) Vedrfolnir
b) Ratatosk
c) Dain
d) Nidhogg