What is a basin?
you guys cant copy from go ogle

Example: An example of a basin is a container in which laundry can be handwasher. An example of a basin is the Amazon Basin where the Amazon River and all its branches and tributaries drain. An example of a basin is the Nashville Basin in Tennessee where all of the rock strata angle down and away from Nashville.

i would say b probably

the atm that sounds like it should be the answer