The video clip below shows an egg of Ascaris lumbricoides.  Which of the following statements is correct regarding this image?

(The video will begin when you move your mouse over the image.)

(a) The clip demonstrates a fertilized egg containing a live larva inside
(b) The clip demonstrates a fertilized egg that is not infective because the larva did not reach the mature stage
(c) The clip demonstrates an unfertilized egg undergoing maturation
(d) The clip demonstrates a fertilized egg containing a blastula