Exam NS0-527 topic 1 question 40 discussion

You are concerned that the transfers of one of your SnapMirror relationships are consuming too much network bandwidth. The network administrator asks that you decrease the amount of bandwidth being used. The SnapMirror transfers for that relationship average about 500 MB in size. There is only a one-hour window in which the SnapMirror transfer can be performed.
In this scenario, what is the minimum level to which SnapMirror transfer throttling should be set to accomplish this task?