Context: Ringed teals eat invertebrates and plants that live near water. The shape of the 's beak is adapted to filter through mud for food.
The  gathers muddy water in its beak and then pushes it out through gaps along the sides. Bits of food, such as plant roots, are left behind inside the teal's beak.
Figure: ringed teal.
Which bird's beak is also adapted to filter through mud?
A. mallard
B. hanging parrot
Answer with the option's letter from the given choices directly.

A