No one would have blamed Mr. and Mrs. Hendricks if they had decided to keep quiet about civil rights following the bombing of their friend's home. But Audrey's parents weren't intimidated. The very next day, her father and about fifteen other blacks sat down in the front section of a bus, where only whites were permitted. When the driver demanded they move to the back, Audrey's father politely refused, saying "We [are] comfortable where we are sitting." As a result, Mr. Hendricks was arrested and spent six nights in jail. When he was released, he volunteered to guard the Shuttlesworths’ home.

Which of Mr. Hendricks’s character traits is best expressed in this excerpt?
his giving nature
his intelligence
his friendly nature
his courage