what would lead to an inadvertent termination of an s corporation

TUI PUlenual: H&R Block Test - S Corporations I (2 Section 1 Question 1 of 15. Which of these can lead to an inadvertent termination of an S corpore corporation? O Failure to file Form 1120S. O Failure to file Form 2553. O Failure to maintain status as a small business corporation. O Revoking the corporation election. Mark for follow up Question 2 of 15. An Scorporation's tax years for 2018-2020 end on 12/28/2018, 12/27/2019 O A fiscal tax year. O A business purpose tax year. A 52-53-week tax year. O A natural tax year. Mark for follow up 99031 Question 3 of 15