You are asked to create an XML schema for a Postal service that accepts an address and returns the corresponding postal code. You are given the following specific instructions as to how the XML schema should be designed:

* The XML schema requires two elements named "PostalCodeLookup" and "PostalCodeResponse".

* The "PostalCodeLookup" element must contain child elements named "address1", "address2," "city", "stateOrRegion" and "country", in that order. Each of these elements must have the type string.

* The "PostalCodeResponse" element must contain only the postal code as a string and this element must not have any child elements.

Which of the following XML schemas fulfills the requirements while also following the instructions?