Leaders that give the group total freedom

Which of the following is true?

a. Cost-reducing automated production techniques will expand output directly and/or release scarce resources for the expansion of output in other areas. b. Automated production processes are generally adopted regardless of whether they reduce costs. c. Use of the most advanced technology will always minimize the cost of a productive activity. d. Automated production processes eliminate jobs and, thereby, endanger our future living standards.

If consumption is $60,000 when income is $80,000, and consumption increases to $68,000 when income increases to $90,000, the MPC is

A. 0.2. B. 0.4. C. 0.6. D. 0.8.