Final answer:
Drinking milk didn't cause a mutation in most people, which is true. Most Europeans can drink milk because of a genetic mutation that occurred thousands of years ago, making them lactose-tolerant.
Step-by-step explanation:
The statement 'Drinking milk didn't cause a mutation' is true. Most adult mammals cannot drink milk due to an inability to produce lactase, an enzyme that metabolizes lactose. However, most Europeans can drink milk because of a genetic mutation that occurred thousands of years ago, making them lactose-tolerant. This genetic mutation provided an evolutionary advantage to Europeans, allowing them to consume milk as part of their diet.