A. "When she ... lived there."
This line only defines a specific detail about how the special agent survived through a fake name as a spy. No central theme is described through this sentence.
B. "Baissac’s goal ... resistance groups."
This statement provides the agent’s motive and the way she enacted the task provided. However, that does not completely cover everything in the passage.
C. "Baissac did ... her tasks."
Significant work is not specific, and Normandy and traveling by a bicycle are smaller and irrelevant details, not the big picture that should be concluded from this passage.
D. "As a ... German troops."
This is the statement that definitely defines the central idea of the excerpt. When we break this line into sections, we can see that it illustrates that she performed multiple essential tasks when appointed in Normandy. The phrase “sometimes dangerous tasks” describes the critical nature of the job she handled in there. And, also the opposition (German troops) is clearly mentioned in this sentence which helps to convey the idea very clearly.
I’m not 100% sure but I’m pretty sure it’s B!
The main advantage could be related to not leaving babies out in the street, mostly in countries where the weather is really harsh. And also, to avoid any kind of danger a baby can suffer just for being in the street. What is more, a mother who does not want that child can make sure, she is leaving him/her in good care and her identity will not be revealed or known.
On the other hand, the concept of 'bin' is not a proper term to use in this case. An unwanted baby is not trash, so he7she should not be associated with this idea. Maybe It should be wiser to resort to another term for the idea.
As regards sources, many people decide to leave their babies in a church or hospital or even hand him/her over a family they know.
In some dramatic cases babies are abandoned in trash cans or put into a garbage bag anywhere.
