It’s just E because ethe positiv and negative current are supposed to flow thorough the bulb in opppsote sides at a equel level.In some them negerive/postive is absent and some of them are connected to the same side
I'd say B.) Increasing the voltage of the battery.
Use of electromagnetic because it moves very faster than others for example xrays theynar very very slow so that not It it is d.
A. An electron has far less mass than either a proton or neutron.