Answer:
Based on historical data and trends in the United States, the correct statement among the options provided is:
A greater proportion of families in America lived in poverty in the 1970s than those living in poverty today.
Over the years, the poverty rate in the United States has fluctuated, but there has been progress in reducing poverty rates, especially when comparing it to the 1970s. However, it's important to note that the specific circumstances and effectiveness of anti-poverty initiatives can vary over time.