Teresa and Sam need to decide which one will take of work to dig holes. Teresa is faster and can do it in 30 min but Sam is slower and will take 3 hours. Teresa ears $ 80 an hour as a doctor and Sam makes $ 10 an hour as a sales clerk. Keeping in mind that one must take off work to complete the task who has the lowest oppurtunity cost of completing the task.'
a. Sam
b. Both have the same identical cost
c. Teresa