Which of the following contains an example of alliteration?

a. "and the lawyer set out homeward with a very heavy heart."
b. ". . he thought the mystery would lighten and perhaps roll altogether away . ."
c. ". . the lamps, unshaken by any wind, drawing a regular pattern of light and shadow."
d. "the geniality, as was the way of the man, was somewhat theatrical to the eye.