What is the 'free-rider problem'?
a. a cost that one person or group imposes on another person or group
b. a benefit that one person or group gets from another person or group
c. a shared good or service that wouldn't necessarily be available if it were provided privately
d. when a person is unlikely to pay for a good or service but will use the good or service if it is free

How were stories with supernatural elements viewed differently in shakespeare's time versus how they are viewed today? a. audiences during shakespeare's time only believed in things that could be explained rationally, unlike audiences today, who believe in the supernatural. b. audiences during shakespeare's time saw supernatural elements in a much more humorous light than today's audiences do. c. audiences during shakespeare's time were used to witches in their neighborhoods, so they didn't find them as scary as we do today. d. audiences during shakespeare's time considered witches and curses to be real and therefore much scarier than today's audiences would.