Question: On what date was the encirclement of Paris complete?
Answer: The Germans expected to negotiate an end to the war but immediately ordered an advance on Paris; by 15 September Moltke issued the orders for an investment of Paris and on 20 September the encirclement was complete.
A single-select problem: Is the question answered in a satisfactory fashion?

Options are: (1). yes; (2). no;
(1).