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Your web application front end consists of multiple EC2 instances behind an Elastic Load Balancer. You configured ELB to perform health checks on these EC2 instances, if an instance fails to pass health checks, which statement will be true?

A. The instance gets terminated automatically by the ELB B. The instance gets quarantined by the ELB for root cause analysis. C. The instance is replaced automatically by the ELB D. The ELB stops sending traffic to the instance that failed its health check.

A problem that requires a heuristic solution might be:

a. Balancing your checkbook. b. Choosing stock on the stock market. c. A calculus problem. d. Baking a cake.