What did the US Supreme Court determine in $2014$ regarding the use of information on a person$$s cell phone by police?

a$.$

That police would be able to search the contents of any person's phone either during an arrest or in a routine traffic stop and$/$or pedestrian 'stop$-$and$-$frisk' situation.

b$.$

That an individual would have to submit his or her phone records to federal authorities for periodic reviews $($typically after a period of no more than $18$ months$).$

c$.$

That police would need to obtain a warrant before searching a person$$s cell phone for information.

d$.$

That without the permission of a mobile carrier, an individual would not be able to obtain his or her own calling records without a judicial subpoena.