The correct answer is C, because omitting the value of _key from the REST endpoint would cause all records in a collection to be deleted. The _key is a unique identifier for each record in a KV Store collection. The REST endpoint for deleting a record from a collection is /storage/collections/data//, where is the name of the collection and is the value of _key. If the is omitted, the REST endpoint becomes /storage/collections/data/, which deletes all records in the collection. The other options are incorrect because they are not the consequences of omitting the value of _key from the REST endpoint. Cleaning the KV store, deleting all content would require deleting all collections, not just one. Producing the syntax error “Key value missing” would not happen, because the REST endpoint is valid without the value. Meaning that the _key value must be passed as an argument would not make sense, because the argument is the same as the value in the REST endpoint.