Answer:
B) fixed costs and a decrease in variable costs.
Step-by-step explanation:
Automated robots used in factories are extremely expensive, but once they are functioning, they can replace a lot of workers and they are very cheap to keep working. Factories that once had thousands of employees now only employ a handful of maintenance and programmers that keep the robots running. even though the robots cost millions of dollars, they operating costs are extremely low, which means they are extremely efficient.
The factory's fixed costs increase due to the high cost of the robots, but the monthly variable costs (specially labor) plummet.