Found at the higher frequency end of the radio spectrum, but they are commonly distinguished from radio waves because of the technologies used to access them what wave is this called

“other instruments such as gravimeters and magnetometers are also used in the search for petroleum. extracting crude oil normally starts with drilling wells into an underground reservoir. when an oil well has been tapped, a geologist (known on the rig as the "mudlogger") will note its presence. “ this is what i found on google i hope it

Ibelieve the answer is either b or c, but i'm leaning more towards c.hope my answer has you : )

Hi. i believe this is called a scientific  theory.cheers!