What is most remarkable about the paintings of Pieter Breugel the Elder?

A. Innovative brush strokes

B. Medium used

C. Daring compositional features

D. Subject matter

Pieter Bruegel the Elder was a Netherlandish representative of the Reinaissanse period. As a painter, he is mostly known for his work involving peasant scenes, being specialized in genre paintings, often with an included landscape element. His main focus of the life and work of the peasants was a rare thing in his time, making Pieter Bruegel a pioneer of the genre painting and a prime source iconographic evidence about certain aspects of the social life in the 16th century. The correct answer is D, subject matter.