In the Context of Order Acknowledgements, Which of the Following

In the context of order acknowledgements, which of the following illustrates the most positive way of handling a vague order?

A) You failed to mention the number of chairs that you need.
B) The expected delivery date was not mentioned in your order.
C) You did not specify the details of the requested products.
D) If you had specified the exact make, we would've shipped your order immediately.
E) Once you let us know which of the two models you would like, we will send it to you immediately.