A retail company implemented a new 'incentive program' for sales staff, leading to a 20% increase in average monthly sales per employee. The CEO attributed this entire increase solely to the incentive program. For each statement, select the choice that best completes it.
✓ Correct Answer: Option C
An alternative cause offers another plausible reason. A necessary assumption eliminates other factors as causes, ensuring the stated cause is the sole or primary driver for the observed effect.