Cruise ships might be a fun way to take a vacation but they do far too much damage to the environment. The ships are harmful to marine life. Research suggests that cruise ships produce more than three times the amount of CO2 that airplanes do. Furthermore cruise ship passengers do
not spend enough time at a given destination to learn about its culture. Does the passenger do not promote loyal culture. The next time you want to take a vacation, try making a train or plane to your destination instead.  Read the last sentence of the paragraph. It is clear that the author wants readers to?

A. Think about the ways in which airplanes harm the environment.

B compare the speeds of different modes of transpiration.

C. learn about the impact of CO2 on cruise ship passengers.

D. Find an alternative to cruise ships when taking a vacation