Older examples of this instrument can contain "processional holes," whose use was eclipsed by a device that comes in a "Tortelier" version. This instrument mimics the chanting of a chazzan on Yom Kippur in Max Bruch's Kol Nidrei. Playing a different one of J.S. Bach's six suites for this instrument, unaccompanied, was a daily habit of Pablo Casals. Mstislav Rostropovich refused to play Elgar's E minor concerto for this instrument after hearing it performed by Jacqueline du Pré. Other famous players of this instrument include Yo-Yo Ma. For 10 points, name this string instrument, lower than a viola, but higher than the double bass.
a) Cello
b) Violin
c) Viola
d) Double bass