Final answer:
The statement is False. Factors such as socio-economic conditions, access to mental health care, and other social factors have a more significant impact on crime rates than gun ownership rates.
Step-by-step explanation:
The statement is B) False. While it is true that gun ownership doubled in the twentieth century, the murder rate did not decrease as a result. In fact, there is no clear causal relationship between gun ownership rates and murder rates. Factors such as socio-economic conditions, access to mental health care, and other social factors have a more significant impact on crime rates.