Answer:
After the accident, NASA reduced the amount of flammable Velcro in the crew cabin, and tested many of the capsule's materials for flammability. Now, as a result of the lessons learned from Apollo 1, many new materials have been developed for spaceflight with fire safety in mind.
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Based on the map I've attached, I'd say that Christianity spread to
most of the Roman Empire by 476 AD. If you look at the map, you will see that before 325, there were some places in Spain and Italy mostly where Christianity existed, however, after that year, it only continued spreading throughout Europe, which mostly belonged to the Roman Empire at the time.
If Otto Esche’s idea to use Bactrian Camels to transport salt would have worked out, there would have been a mad rush to the British Columbia, Canada area. The economy for the province would have more than likely boomed, creating a wealthy area. Salt was a very expensive, yet useful commodity as it was used to preserve meats and cure leather. This made it invaluable during this time period. It could also help to sustain soldiers during war (circa Civil War).
Of the eight largest countries in the world by area, seven—Russia, Canada, the United States, Brazil, Australia, India, and Argentina—are organized on a federal basis. (China, the third largest, is a unitary state
The answer is D, for W.W.'s 14 points.