Explanation
The correct answer is A, because the correct post-process syntax for the base search shown below is var mypostproc1 = new PostProcessManager {{ id: "post1", managerid: "base-search", search: "| stats count by sourcetype" }}. The PostProcessManager is a JavaScript object that creates a post-process search that runs on the results of a base search. The PostProcessManager requires three parameters: id, managerid, and search.
The id is a unique identifier for the post-process search. The managerid is the id of the base search that the post-process search depends on. The search is the post-process search string that runs on the base search results. The other options are incorrect because they either use the wrong managerid, the wrong object name, or the wrong search string.