Like (B), neither speaker makes this claim. Alissa and Greta are discussing the hypothetical case that the city might need to choose between these two services. Neither directly expresses an opinion about whether that choice is actually necessary.

Like (A), this is not a topic in discussion. Alissa and Greta are concerned with what the city should do if the mayor’s claim is true, but they never discuss whether the mayor’s claim is actually true.

Alissa agrees that this should happen but Greta disagrees, so this is the point of disagreement. If the city has to choose between television and the museum, Alissa argues that it should save the museum, but Greta says it should save the television programming.

Greta agrees that the television programming reaches more children than the museum, but Alissa doesn’t disagree. Alissa says nothing about how many children interact with each service, and just focuses on the quality of each one.

Alissa agrees that this is true, but Greta doesn’t disagree. Greta isn’t saying that the museum has no educational value, she just thinks it’s more important to reach a greater number of children.