Is an administrative trust formed from my mom's revocable living trust when she dies still considered as grantor's trust?

[siblings2017]

My mom died October 27, 2016.  Her living revocable trust became an administrative trust with an EIN number.  The trust continues to be in effect because their is an active business now owned by 3 siblings still held in the trust.  Turbo tax asked if this trust is a grantor trust.  It was when set up as a revocable living trust 

[RichardG]

A revocable trust ceases to be a grantor trust when the grantor dies.  The trust is now irrevocable and a separate taxpayer.