What is this passage mostly about?
A. a Chevy Tahoe nicknamed Boss
B. a competition to design robotic cars
C. the stages of development of robotic cars
D. desert obstacle races
for robotic cars
B. a competition to design robotic cars
A. a Chevy Tahoe nicknamed Boss
B. a competition to design robotic cars
C. the stages of development of robotic cars
D. desert obstacle races
B. a competition to design robotic cars