Chen created a grantor trust in 2016 and obtained an employer identification number (EIN). He passed away on October 19, 2021. His personal representative is the trustee of his testamentary trust and the personal representative of his estate. The personal representative will need to:

A)Apply for an EIN for the estate and keep the grantor trust EIN for the testamentory trust.

B)Apply for one new EIN for both the estate and the testamentory trust.

C)Keep the same EIN for both his estate and the testamentory trust.

D)Obtain a separate EIN upon Chen's death for the estate and the testamentory trust.

PLEASE help with homework...