The correct answer is C. Although Peterson's comments may have been valid at one time, his book is over 30 years old.
This sentence is challenging the credibility of Peterson's book because it is old. At one point, his arguments may have been correct, but this has certainly changed over time given that over 30 years have passed since he published his book. Now, there are newer opinions about the topic, so he isn't a credible source anymore.
The correct answer to this open question is the following.
The two intervention programs that the government could put into place to encourage tourists, not to litter would be the following.
1.- Advertising campaign in the United States airports. As soon as tourists arrive in the United States, there would be TV screens and signs in every airport, informing that littering is strictly prohibited in the United States.
2.- US embassies abroad. A similar campaign should be implemented in the many US embassies around the world. So when people solicit their visas to enter the United States, they could be informed that there is strict legislation in the US regarding littering.
This way tourist will be informed previous their arrival to the country.
These recommendations will help the illegal dumping situation for tourists in that they will be very aware that there will be serious consequences if they are caught littering.
