Which feature distinguishes AWS Savings Plans from Reserved Instances in terms of instance flexibility?
ASavings Plans require upfront payment, but Reserved Instances are always pay-as-you-go.
BReserved Instances offer discounts only for spot instances, whereas Savings Plans cover on-demand instances.
CSavings Plans apply discounts across multiple instance families and sizes, while Reserved Instances are specific to instance attributes.
DReserved Instances provide discounts only for EC2, while Savings Plans apply to S3 storage.