Askilled manpower can produce more manpower

Potentially, a large spill can be: a) an environmental threat, if it gets into drains b) a dangerous fire hazard c) harmful to individuals d) all of the above

Which statement is correct ? a. aborigines were the first people to settle australia and new new zealand. b.aborigines were the first people in australia,and maori were the first people in new zealand c. the maori were the first people in australia, and aborigines were the first people in new zealand . d.the aborigines and the maori descended from the polynesians, the first people to settle australia and new zealand.

Give an example to prove that your society is developed more than it was before 10 years ?