Indicate the correct statement pertaining to Ascaris.
A. Snail is the secondary host of Ascaris
B. A larva stage of Ascaris is swallowed by cattle which in turn infects human biengs
C. The eggs of Ascaris containing second stage juvenile larva when swallowed by man become infective
D. Once inside the intestine the Ascaris larva directly develops into an adult without entering other organs of the host