Form 1041 - Check All That Apply

My father passed away 3 months ago. He had a Revocable Trust which became an Irrevocable Trust when he passed away. My father’s Estate lawyer obtained a new EIN for the Trust. I am going to hire a CPA to file form 1041. Looking at form 1041 it’s ask to choose all that apply (below). I would think “Decedent’s Estate” and “Grantor Type Trust” apply since my father was the Grantor of his Trust and is now deceased. I am not sure whether it’s a “Simple Trust” or “Complex Trust”. I would think Complex because the terms of the Trust say that Principal can remain in the Trust and doesn’t have to be distributed right away.
 
Check all that apply:
 
1) Decedent’s estate
 
2) Simple trust
 
3) Complex trust
 
4) Qualified disability trust
 
5) ESBT (S portion only)
 
6) Grantor type trust
 
7) Bankruptcy estate—Ch. 7
 
8 ) Bankruptcy estate—Ch. 11
 
9) Pooled income fund