French colonizers and it was never resolved.
The correct answer is the second one
<span>The Opium Wars were two wars in the mid-19th century involving Anglo-Chinese disputes over British trade in China and China's sovereignty. The disputes included the First Opium War and the Second Opium War.</span>
You would be mostlikely to find a high population density "along the banks of
<span>the Niger River," since rivers bring water, which is a crucial element of human survival. </span>
the answer to your question is a) they had advanced planning and developed effective military methods.
