It is thought that the concept of intrauterine devices (IUD) stems from ____.

It is thought that the concept of intrauterine devices (IUD) stems from ____.
 
  a. a Victorian era tradition in which women of the elite class would go to spas to receive uterine implantations to enhance orgasm
  b. camel drivers, who would insert small stones into the uterus of female camels to prevent pregnancy
  c. devices inserted into the cervix that were used during the depression era to abort fetuses
  d. a medical technique dating back to WWI, in which copper marbles were placed into a woman's cervix to shrink uterine tumors