Horseshoe Crabs,genetically Related to Scorpions and Spiders,are Capable of Only

Horseshoe crabs,genetically related to scorpions and spiders,are capable of only one type of fertilization.Female horseshoe crabs dig a shallow hole near the ocean shoreline that can fill with water.They then lay their eggs in that hole,and male horseshoe crabs mount the females and deposit their sperm over the eggs.This is an example of

A) external fertilization without copulation.
B) external fertilization with copulation.
C) internal fertilization without copulation.
D) internal fertilization with copulation.