There Is a Global Search Named "Global_search" Defined on a Form

There is a global search named "global_search" defined on a form as shown below: <search id="global_search">    <query>    index-_internal source-*splunkd.log | stats count by component, log_level    </query> </search> Which of the following would be a valid post-processing search? (Select all that apply.)

A) | tstats count
B) sourcetype=mysourcetype
C) stats sum(count) AS count by log level
D) search log_level=error | stats sum(count) AS count by component