The Grand Canyon is approximately 29 kilometers long. Mariner Valley is a canyon on Mars that is approximately 212 kilometers long. About how many times longer is Mariner Valley than the Grand Canyon? 1. 2
2. 2 to the power of 3
3. 2 to the power of 21
4. 2 to the power of 108

PLEASE HELP ASAP WILL MARK YOU BRAINLIEST!!

answer; (d) i believe the best answer is ; ///people said that man could not fly, but in 1903, orville and wilbur wright made the first sustained powered flight in a heavier- than-air machine;

what is the novel plz take a picture

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i am also pretty sure it is c