The first atmosphere was mostly water vapor, but by 3.8 million years ago the atmosphere had changed to mainly CO2 (carbon dioxide) and methane. What happened to the water vapor? A. Chemical reactions from the heat and solar radiation changed it into the CO2 and hydrogen gas.
B. The early earth's gravitational field wasn't strong enough to trap it, and it escaped into space.
C. Condensation over time converted it to rain and then eventually oceans.
D. The water vapor bound with silicon, sodium, and other light metals forming sediment that settled on the surface and fused into the earth's crust.

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.

colors do exist. the color of the sky is actually violet; humans percieve the color of the sky as blue.

your answer would be a, maximum exploitation of resources.