If the user has not specified the draining time, how long will ELB allow inflight requests traffic to continue?

A user has setup connection draining with ELB to allow in-flight requests to continue while the instance is being deregistered through Auto Scaling.

If the user has not specified the draining time, how long will ELB allow inflight requests traffic to continue?
A . 600 seconds
B . 3600 seconds
C . 300 seconds
D . 0 seconds

Answer: C

Explanation:

The Elastic Load Balancer connection draining feature causes the load balancer to stop sending new requests to the back-end instances when the instances are deregistering or become unhealthy, while ensuring that inflight requests continue to be served. The user can specify a maximum time (3600 seconds. for the load balancer to keep the connections alive before reporting the instance as deregistered. If the user does not specify the maximum timeout period, by default, the load balancer will close the connections to the deregistering instance after 300 seconds.