Prudence and Procedure in the Context of Protecting Against ERISA Class Actions

https://www.planadviser.com/exclusives/op-ed-erisa-prudence-demands-healthy-esg-skepticism/

https://www.plansponsor.com/erisa-prudence-methodology-aggregate-outcomes/

What are the basic questions that fiduciaries of Employer Sponsored Retirement Plans should be asking?