Answer:
A. The writer wants to share additional information about what children who take lesson experience.
Step-by-step explanation:
Option A is the correct answer.
Actually, the use of "Furthermore" by the writer to connect sentences 11 and 12 signals to the reader that the writer is sharing an additional information about what children who take lesson experience.
"Furthermore" is an adverb which is used in sentences to introduce additional information or consideration. It helps to give more explanation on the given information for further clarification and understanding.