Tom has created a new ad for his campaign but he's not seeing his ad show up in the Google results. Tom would like to invoke the Ads Diagnostic Tool to determine why his ad isn't showing in results. Where can Tom access the Ads Diagnostic Tool?
A. Campaigns tab within Tom's Google AdWords account
B. Home tab within Tom's Google AdWords account
C. Reporting tab within Tom's Google AdWords account
D. Opportunities tab within Tom's Google AdWords account