Concept:An assertive sentence that shows a cause-and-effect relationship can be changed into an interrogative sentence by using a negative question form that keeps the same meaning.
Explanation:The given sentence means that when the Federal Reserve increases interest rates, emerging market currencies become more volatile.
To turn it into a question while preserving this idea, we need a structure that asks for confirmation.
Option B begins with "Do not", which creates a rhetorical question that expects the answer "yes".
This form retains the original "the more... the more..." pattern and logic.
Option A uses "Do" but breaks the parallel structure.
Option C changes the wording and meaning significantly.
Option D also alters the focus and does not keep the direct cause-effect link.
Therefore, only Option B correctly converts the assertive sentence into an interrogative one without changing the intended meaning.
Answer:B. Do not the emerging market currencies become more volatile the more the Federal Reserve raises interest rates?