Mach

i would reccomend doing it something that has to do with alternative oils to power cars. make like a car that runs on a new form of fuel or create your own version or plans of a hydrogen fuel cell

i dont think that human brain will be able comprehend what happened before the big bang.

i would definately want everyone to change to the metric system. im in canada and everythign with measurement is just so darn easy and u dont need to memoreize weird conversion units.

i would say d, but i have no idea what b is so that might be the answer

^ i really dont think so because the force is so immense that not even light can escape