Answer: D... building two runways
Explanation: Just had this question and it shows D is the correct answer
Guys for real, if you need help, please send the passages with the questions also.
Precambrian is the era that makes up the vast majority of the Earth’s history.
Answer:
I believe the printing press. Before the printing press books were very rare and expensive. Most religious scrolls were put on cloth or papyrus(a type of plant). After the invention of the printing press it made books less rare and expensive. And launched the world into a more modern era.
