A young worker is starting her first job at a research lab. She spent four years in college getting a degree in biology to prepare her for the career she
wanted. Then, she applied for a job at the lab and negotiated a good salary
for herself after she was hired.
This young worker is most likely part of which economic system?
A. Command economy
B. Market economy
C. Mixed economy
D. Traditional economy

Nextdoor is an instant messaging application for smartphones. new smartphone users find it easier to connect with friends and relatives through this mobile app when compared to other similar instant messaging applications. hence, it has the largest user base in the industry. thus, nextdoor app's value has increased primarily due to itsa. learning curve effects. b. economies of scale. c. economies of scope. d. network effects.