In the 1990s, Zion National Park in Utah became an extremely popular tourist destination which resulted in millions of visitors driving their cars through the park each year. The noise made by the cars of the visitors caused ecosystem disruption because many species of animals depend on sounds for communication and to attract mates. Which of the following would be the most reasonable measure to control such human-made noise pollution?
A.
provide shuttle buses to transport visitors through the park
B.
encourage visitors to search for animals in the park that are being disturbed by the noise
C.
construct soundproof walls in buildings and offices located in the park area
D.
construct several bathrooms and water facilities along the main roads of the park

answer
A.
provide shuttle buses to transport visitors through the park