Which line from Chaucer’s “General Prologue" to The Canterbury Tales is a reference to the feudal social structure of medieval England?

A. Full worthy was he in his liege-lord's war,
B. And therein had he ridden (none more far)
C. As well in Christendom as heathenesse,
D. And honoured everywhere for worthiness.
E. At Alexandria, he, when it was won;