A developer created a new application that uses Spot Fleet for a variety of instance families across multiple Availability Zones.
What should the developer do to ensure that the Spot Fleet is configured for cost optimization?

A. Deploy a capacityOptimized allocation strategy for provisioning Spot Instances.
B. Ensure instance capacity by specifying the desired target capacity and how much of that capacity must be On-Demand.
C. Use the lowestPrice allocation strategy with InstancePoolsToUseCount in the Spot Fleet request.
D. Launch instances up to the Spot Fleet target capacity or the maximum acceptable payment amount.