A trust has a traditional IRA where the account holder has just passed away. There are four beneficiaries of the trust.
Trying to figure out what rule to follow. From what I read, the beneficiaries could follow the 5 year rule or take distributions according to lifespan. Is this correct? Can each beneficiary choose the path best for them? Also, will the IRA contract carrier be obliged to honor this for each beneficiary?

https://www.irs.gov/retirement-plans/plan-participant-employee/retirement-topics-beneficiary
From the IRS website:
Death of the account holder occurred in 2020 or later
Beneficiary that is not an individual

Follow the rules described above as if the account owner died before 2020 (because the SECURE Act changes only apply to beneficiaries who are individuals)

so going back up the page, I got the following:

Death of the account holder occurred before 2020
Non-spouse beneficiary options
If the account holder’s death occurred prior to the required beginning date (or if the account is a Roth IRA), the non-spouse beneficiary’s options are:

Take distributions based on their own life expectancy, beginning the end of the year following the year of death, or
Follow the 5-year rule
If the account holder’s death occurred after the required beginning date, the non-spouse beneficiary may:

Take distributions based on the longer of their own life expectancy or the account owner’s remaining life expectancy.