Which one of the following is NOT a debugging strategy for client-side scripts?

Which one of the following is NOT a debugging strategy for client-side scripts?

A. g_form.addInfoMessage()
B. Field Watcher
C. jslog()

D. gs.log()

Reference: https://developer.servicenow.com/dev.do#!/learn/learning-plans/istanbul/new_to_servicenow/app_store_learnv2_scripting_istanbul_debugging_client_scripts