Correct option is :- D. Rules are evaluated in sequential order & IAM role for first matching rule is used ,unless a ‘CustomRoleArn” is specified to override the order.
When multiple rules are assigned, rules are evaluated in a sequential order & the IAM role for the first matching rule is used unless a‘CustomRoleArn”attribute is added to modify this sequence.
Option B is incorrect as a standard attribute does not alter rule evaluation.
Option A & C are incorrect as for each rule there is no preference value.