400
Sung was fascinated with the lectures and worked hard on his homework, unlike his classmate Ami, who seemed indifferent to everything, rarely participated in group discussions, and showed little interest in the readings.
Indifferent means
a. taking chances.
b. unresponsive and uninterested.
c. working equally but differently.
d. happening at the same time.
What is b. unresponsive and uninterested.