The correct effect of Charles Lindbergh's flight across the Atlantic Ocean is:
His demonstration of the reliability and safety of airplanes led to increased interest in air travel among Americans.
Lindbergh's historic solo flight from New York to Paris in 1927 showcased the potential of commercial aviation, significantly boosting public confidence in air travel and sparking interest in the industry. His achievement helped to pave the way for the growth of commercial airlines and transformed air travel into a viable mode of transportation.