PLEASE HELP ME ASAP!!!!!

Which edit to this sentence is necessary to correct a writing error? Lines of latitude and longitude form a grid system on the globe. Any location on Earth can be discribed with a pair of measurements indicating its latitude and longitude. A. Change "its" to "it's" B. Change "form" to "are forming" C. Change "Earth can be" to "Earth, can be" D. Change "discribed" to "described"​