This question is missing the options. I've found the complete question online. It is the following:
What does the stained attire of the Knight suggest about his personality?
a. the Knight is careless and unreliable.
b. the Knight is modest and honorable.
c. the Knight is deferential and dejected.
Answer:
The stained attire suggests:
b. the Knight is modest and honorable.
Explanation:
Chaucer's Knight represents military prowess, honor, good manners, and generosity. He is the noblest of the pilgrims. The Knight has fought in the Crusades, demonstrating his loyalty and commitment by fighting in the name of God and the King. He is dressed in an attire made of coarse cloth. It is stained by the rust from his coat of chainmail (a part of a knight's armor, made of circles of metal), which shows his modesty and simplicity.