Which of the following sentences with participial and absolute phrases is punctuated correctly? a. the little dog, alight-brown terroir walked confidently down the side walk. b. the key, hidden in a box, was, too, old to be of use. c. the waiter, glancing at the clock, could not, wait, until, his, shift, was, over. d. her jaw dropping down, the girl was shocked by the presence of the enigmatic clown.