Which of the Following Was the Result in United States

Which of the following was the result in United States v.Forrester,the case in the text involving the issue of whether,without a search warrant,the government can obtain e-mail addresses and information regarding Internet sites visited through installation of a device at the location of the Internet service provider?

A) That the government violated the defendant's constitutional rights because no warrant was obtained.
B) That obtaining the information did not constitute a Fourth Amendment search, and that the defendant's constitutional rights were not violated.
C) That obtaining the information was a Fourth Amendment search, but that the defendant's constitutional rights were not violated.
D) That obtaining the information did not constitute a Fourth Amendment search, but that the defendant's due process rights were violated.