Which of the Following Statements About the PATRIOT Act Is

Which of the following statements about the PATRIOT Act is correct?

A) The PATRIOT Act created clear definitions between law enforcement agencies and intelligence arms of the government.
B) The Foreign Intelligence Surveillance Court has ruled that the PATRIOT Act violates the Fourth Amendment.
C) Agents of foreign governments are the main focus of search and surveillance activities permissible under the PATRIOT Act.
D) The PATRIOT Act permits the government to secretly search a suspected terrorist's home.
E) National Security Letters are mandatory for activities conducted by the FBI according to the PATRIOT Act.