46. 當需要使用 BroadcastReceiver 來攔截特定資訊時，需要先註冊指定的 BroadcastReceiver 和欲攔截的 Broadcast，請問可透過下列何者來註冊？ (A) registerReceiver (receiver, filter)； (B) registerBroadcastReceiver (receiver, filter)； (C) unregisterReceiver (receiver, filter)； (D) unregisterBroadcastReceiver (receiver, filter)；