Explanation
The correct answer is A, because data can be added to a KV Store collection only in JSON format. KV Store is a feature that allows Splunk to store and manage data in collections of key-value pairs. A KV Store collection is a logical grouping of key-value pairs that can be accessed and manipulated by Splunk apps. Data can be added to a KV Store collection either by using the Splunk Web interface, the Splunk REST API, or the Splunk SDKs. In all cases, the data must be formatted as JSON objects, which are collections of name-value pairs enclosed in curly braces1. The other formats, such as XML, CSV, and TXT, are not supported by KV Store.