Assuming a Calendar Tax Year and the Conventional 15th of the Month

Multiple Choice

Assuming a calendar tax year and the conventional 15th of the month due date,all of the following business entities must file their 2019 tax returns by the March 15,2020 except

A) the C corporation.
B) the S corporation.
C) the partnership.
D) All of the above entities must file their 2019 tax returns by March 15,2020.