Which of the following statements is true about the Partner WSDL?

The statement that the Partner WSDL is loosely typed and that objects are discoverable is accurate because the Partner WSDL is designed to allow for dynamic discovery of Salesforce objects and their fields. This WSDL provides a greater level of flexibility for developers because it does not require strict data types for each field, which means that developers can interact with the Salesforce API without needing to have a precise definition of all the fields and data types ahead of time. This is particularly beneficial in scenarios where the schema may change or when working with various objects in Salesforce, as it enables developers to query and work with these objects more fluidly.

In contrast, the other options present features or characteristics that do not align with the true nature of the Partner WSDL. Since it is loosely typed, it facilitates working with dynamically defined objects rather than requiring stringent adherence to specific field definitions and data types found in strongly typed WSDLs. This characteristic enhances the usability and adaptability of the API, making it suitable for various integration scenarios.