Given the code below, how would you set up the for() loop to iterate over the entire list using a numeric index?
marbles = ["red","blue","green","orange","yellow"]
for ????:
#loop body
a.
for i in marbles:
b.
for i in range(0,marbles):
c.
for i in range(0,len(marbles)):
d.
for i in [0,len(marbles)]: