You are presented with the question "When do platyhelminthes reproductive organs develop?" and the following answer choices: 
- when they become adults
 - It helps them survive
 - produce offspring
 - By wind and rain
 - during the day
 - members of their own species
 - an area swollen with pus
 - Something coming from a gland

Now knowing that adult worms go through a major transformation to develop reproductive organs and marine flatworms belong to a major group of worms called the Platyhelminthes, choose the best answer.


 

 when they become adults        