Answer:
Nile = 6,650km
Explanation:
Euphrates = 2,800km (in Western Asia, not Africa)
Indus = 3,180km (in South/Central Asia, not Africa)
B it is b my friend
You are welcome
They were soldiers and had been slaves before
C. Is a Factual Statement
This one is tricky, because scientific law can explain an observation, or be used to make a prediction, but I believe that C. is the most correct of the 4 answers.