The SAP Field Service Management Query API is a RESTful API designed for retrieving data from the system. According to the official SAP developer documentation, all responses from the Query API are returned in JSON (JavaScript Object Notation) format. JSON is a lightweight, human-readable, and machine-parsable data-interchange format, making it the standard for modern web APIs. The API does not support other data formats like XML or HTML for its response payload.

A. Text: This is too generic. While JSON is a text-based format, the response is specifically structured as a JSON object, not as unstructured plain text.

B. XML: The SAP FSM Query API exclusively uses JSON for its responses. It does not provide an option to receive data in XML format.

C. HTML: HTML is a markup language used to display content in a web browser. It is not a data interchange format and is not used for API responses.

1. SAP Help Portal

SAP Field Service Management Developer Guide: In the "Query API" section

all examples of API responses are explicitly shown in JSON format. The guide states

"The Query API is a RESTful API that allows you to retrieve data from SAP Field Service Management." The structure of RESTful responses in this context is consistently JSON. (See section: Query API > Querying Objects).

2. SAP Help Portal

SAP Field Service Management Developer Guide: The "API Basics" section implicitly confirms the use of JSON by detailing the structure of requests and responses

which aligns with standard JSON-based REST API conventions. The Content-Type header for such APIs is typically application/json. (See section: API Basics > Authentication and Authorization).