4.choose the best paraphrase from these lines of the sidewalk walker?

i'm the one and only/ single engine/human auto/mobile.

a. i wish i could move as fast as a car or a plane, but i cant because i'm only human.
b. i feel as if i am both a single-engine plane and a car.
c. with my one-engine heart, i am part of my skateboard, moving as fast as a car.
d. only when i can drive i will be able to move as swiftly and skillfully do now.