What was the basics of the ruling in the recent US Supreme Court case, Carpenter v. United States, decided June 22, 2018?(This may not be in your text-book, as it was decided fairly recently.)

a.The government can legally obtain "location history" from your mobile-phone service provider (like Verizon), that would show where your phone has been (and thus where you have been) without having to get a search warrant.

b.The government must get a search warrant from a court first, a protection based on the First Amendment to the US Constitution, before asking your mobile-phone service provider for your "location history" records.

c.The government must get a search warrant from a court first, a protection based on the Fourth Amendment to the US Constitution, before asking your mobile-phone service provider for your "location history" records.