Mass tourist travel took off in the 1960s and began to diversify because of which of the following?

Name: Mass tourist travel took off in the 1960s and began to diversify because of which of the following?
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Mass tourist travel expanded in the 1960s due to a combination of factors: increased leisure time, more discretionary income, decreasing costs of travel, and a growing number of retirees, all of which contributed to the diversification and growth of the tourism industry.

Mass Tourist Travel Took Off in the 1960s and Began