ep·och - noun
a period of time in history or a person's life, typically one marked by notable events or particular characteristics.
"the Victorian epoch"
The earliest of civilizations were based around river valleys. This allowed them to irrigate fresh water to their crops allowing for better farming and therefore, bigger and better civilizations.
A...twenty countries whose people share a common religion and cultural heritage
C...The worlds largest fresh water lake
D...China and England
PLZ HELP ASAP