This is a statement and assumptions question from critical reasoning. The statement links two causes, education and a small family norm, to one result, national progress and prosperity. To find the implicit assumptions, we check what the speaker must be silently believing for the claim to make logical sense.
Since only assumption A is required to hold up the statement, and assumption B is an unrelated addition, only A is implicit.
Let's summarize:
The correct answer is option (1), only A is implicit.