San Juan High School and Grand County High School are two of several Utah _____ enormous geoglyph of the letters SJ overlooks San Juan High, while a geoglyph of the letter G overlooks Grand County High.
Which choice completes the text so that it conforms to the conventions of Standard English?
schools that have their own hillside geoglyphs. An
A
schools, that have their own hillside geoglyphs and an
B
schools that have their own hillside geoglyphs, an
C
schools, that have their own hillside geoglyphs, and an