Which evidence from the passage best supports the inference that nikola tesla was very creative?

(a)"he built a laboratory in colorado where he tried to generate one hundred million volts of electricity in order to use what he called the earth’s 'resonant frequency' to send signals around the world without wires."

(b)"tesla not only did the job overnight, but he also told edison that he could redesign the generators so that they would work better and save money."

(c)"tesla even boasted of his early forays into inventing, 'i needed no models, drawings, or experiments. i could picture them all as real in my mind.'”

(d)"at one point, he sent lightning bolts 135 feet in the air, and the nearby city of colorado springs went dark when he shorted out their power system."