20. Which job description refers to the work of the mitochondrion?
A. Needed: alert and reliable worker to monitor and control entry requirements of visitors
B. Needed: high energy worker willing to be on call 24-7 to produce power on demand
C. Needed: detail-oriented assembly-line worker to work in a fast-paced environment
D. Needed: manager with great multi-tasking skills to keep a busy factory working efficiently