Answer: Option 'c' is correct.
Explanation:
Since we have given that
In case of Waldo:
Number of hours they work = 8
Number of units per hour = 7 units
So, Output would be

In case of Emerson:
Number of hours they work = 6 hours
Number of units per work = 10 units
So,Output would be

Hence, Emerson’s productivity and output are greater than Waldo’s.
Therefore, Option 'c' is correct.