Option D is correct because Tooling API is the Salesforce API that can be used to retrieve code coverage and test results for Apex classes and triggers. Tooling API provides REST and SOAP interfaces to access metadata about code, execute tests, and get test results12
Option A is incorrect because SOAP API is a Salesforce API that can be used to create, retrieve, update, or delete records, but not to get code coverage and test results. SOAP API uses a WSDL file to define the parameters for accessing data through the API3
Option B is incorrect because Analytics REST API is a Salesforce API that can be used to access data from reports and dashboards, but not from code coverage and test results. Analytics RESTAPI provides a programmatic way to interact with analyticsfeatures such as lenses, datasets, and dashboards4
Option C is incorrect because Metadata API is a Salesforce API that can be used to retrieve, deploy, create, update, or delete customization information, such as custom object definitions and page layouts, but not code coverage and test results. Metadata API is mainlyused for development tools or backup tools5
[References: 1: Introducing Tooling API 2: Tooling API Examples 3: SOAP API Developer Guide 4: Analytics REST API Developer Guide 5: Metadata API Developer Guide, , , ]
