Answer: :)
Explanation:
The primary evidence for the domino theory is the spread of communist rule in three Southeast Asian countries in 1975, following the communist takeover of Vietnam: South Vietnam (by the Viet Cong), Laos (by the Pathet Lao), and Cambodia (by the Khmer Rouge).
That would be Cornelius Vanderbilt
It was Germany im pretty sure
:)
Because Slate was more common in wet microclimates.
Hope I Helped :)