An argument states: 'Our company's new rigorous employee training program, implemented last quarter, has led to a 15% increase in productivity. Therefore, to ensure continued growth, we must continue investing heavily in such training programs.' Which of the following is an unstated assumption necessary for the conclusion to be valid?
✓ Correct Answer: Option A
The argument assumes a direct causal link between the training program and increased productivity without considering other factors. If other factors contributed, the conclusion to solely invest in training is weakened.