Who is known for the following quote? “The dignity of the artist lies in his duty of keeping awake the sense of wonder in the world. In this long vigil he often has to vary his methods of stimulation; but in this long vigil he is also himself striving against a continual tendency to sleep.”

a.
Matthias Grünwald

b.
Marc Chagall

c.
Albrecht Altdorfer

d.
Albrecht Dürer