What is the best definition of the underlined word?

in san diego, a $10 billion, 80-mile run of -maglev- trains will be used for airport transportation.

a.

trains that goes up to 300 mph

c.

both of these

b.

a method by which an object is suspended with no support other than magnetic fields

d.

neither of these



please select the best answer from the choices provided


a

b

c

d