Answer:
January 1, 2020
Step-by-step explanation:
Since we were told that Clampett was formed by J.D in which he included Granny, and Jethro as the shareholders this means that if , Jethro sold its shares to Jane on January 15,2019 while on the other hand Clampett filed an S corporation election with J.D. Granny, and Jane on February 28, 2019 , the earliest effective date of the S election will therefore be the beginning of another year which will be January 1 ,2020.