Three bulbs connected in series:
a) are brighter than one bulb
b) do not light up
c) are dimmer than one bulb on its own
d) are the same brightness as one bulb
whoever answers i am gonna make him as brainlist

I'm thinking it's 2 you are asked to explain the earth's magnetic field. which is the best reply? 1. the earth's magnetic south is similar to the north pole of a magnet. 2. the earth's core has a strong magnetic charge similar to the south pole of a magnet. 3. the earth's geomagnetic south is similar to the south pole of a magnet. 4. the earth's magnetic charge is not centered at either pole; it varies based on location.