Explain a developer has a following trigger that fires after insert and creates a child case whenever a new case is created. list childcases = new list(); for(case parent: trigger. new ) { case child = new case(parentid = parent. id, subject = parent. subject); childcases. add(child); } insert childcases; what happens after the code block executes? a. multiple child cases are created for each parent case in trigger. new b. a child case is created for each parent case in trigger. new. c. the trigger enter an infinite loop and eventually fails. d. the trigger fails if the subject field on the parent is blank.