Life in the 19th century was vastly different from today. Communication relied on letters and telegraphs, taking days or weeks, unlike our instant messages and video calls. Transportation was primarily by horse-drawn carriages or trains, a far cry from modern cars and airplanes. People often grew their own food, whereas now most buy groceries from supermarkets. Based on the text, what is a significant overall impact of the changes in lifestyle and customs from the 19th century to the 21st century?
A) People are generally unhappier now than in the past.