Answer:
The broker should respond that the Specialist (DMM) on the NYSE flooris obligated to buy the stock at the current market.
Step-by-step explanation:
Now under the NYSE rules, to make a nonstop market in the assigned stock. A customer is will always be guaranteed that the trade will be executed - on the other hand, the price at which the trade is effected is constantly subject to various market conditions.
So the best response from the broker is that the Specialist (DMM) on the NYSE floors is required to buy the stock at the current market.