How to attach a same list event receiver to multiple lists in SharePoint

I have say suppose 10 lists and I have to attach an Item added event on all the lists, fortunately the event has to perform almost the same kind of work for all the lists. So I was thinking if there is a way to use the same event on all the lists instead of creating a new and seperate event for all the 10 lists..

1) Create a feature. On the FeatureActivated(), registed the event receiver(a single class file) against mutliple lists

Add an event receiver to a specific list programmatically

for example:

public override void FeatureActivated(SPFeatureReceiverProperties properties)
SPWeb oWeb = (SPWeb)properties.Feature.Parent;
oWeb.Lists[list1].EventReceivers.Add(_eventType, Assembly.GetExecutingAssembly().FullName, "EventReceiverProject1.EventReceiver1.EventReceiver1");

oWeb.Lists[list2].EventReceivers.Add(_eventType, Assembly.GetExecutingAssembly().FullName, "EventReceiverProject1.EventReceiver1.EventReceiver1");

// add for 10 lists


2) You can have one content type that is used in all the 10 lists and and then attach the event receiver to this content type

How to Add an Event Receiver to a Content Type by Programmatically in SharePoint