In 1976, the Inuit rock group Sikumiut recorded the album People of the Ice. Though only their first record, it shows a band already skilled at the difficult task of making music that sounds easy and fun. On songs like "Ultriumavunga," Lucassie Koperqualuk's guitar riffs effortlessly ________ Charlie Adams's delightfully catchy vocal melodies.

Which choice completes the text so that it conforms to the conventions of Standard English?