Which of the following sentences from the article supports the idea that inventors not succeeding the first time is a good thing?

a
The ROV exercise wasn't a competition, but a self-test of each team's design and maneuvering ability.
b
"I thought we'd come to the pool and everything would work perfectly," said Vivian Kocsis, 12. "It didn't."
c
"A mistake is not the end of the world," said McDonald. "Fixing it builds confidence."
d
Students patiently tackled these problems on-site.

they are both the same distance away from the equator and from the poles. both circles are at 66 1/2 degrees. also they both form imaginary line borders of polar regions.

within these regions are all the major types of biomes in the world. a biome is a community of animals and plants spreading over an extensive area with a relatively uniform climate. some diverse biomes represented in north america include desert, grassland, tundra, and coral reefs.

the correct answer would be true friction causes the faults to slip or collide