Which of the following sites in california are potential targets of a terrorist attack

Explanation:

Terrorist attack is the violence caused or people killed by militant group or terrorist group in order to break the national harmony. It is one f the most important global problem that needs to be tackled.

Some of the potential target site of any terrorist attack in California are --

All of the above sites are declared as "critical infrastructure" in the Patriot Act of 2001 of the United States and any destruction to any of these structures may impact the national security and economy of the country.

answer; i believe the correct answer is (a) the correlation between the cause variable and outcome variable is zero;