The answer is
B. Gypsum Hills
The United States entered WWII after the Japanese bombed Pearl Harbor.
D.The Egyptians could not build roads, and therefore they had to depend on the Nile river for transportation.
Answer:
Transistor computers were built. The first mobile phones were built. Computers using vacuum tubes were invented. Computers with integrated circuits were invented. The World Wide Web was created.
Explanation:
