Scientists who studied the famous gold field known as Serra Pelada concluded that the rich lode was not produced by the accepted methods of ore formation but that swarms of microbes over millions of years concentrated the gold from jungle soils and rivers and rocks.

• Anot produced by the accepted methods of ore formation but that swarms of microbes over millions of years  
• Bnot produced by the accepted methods of ore formation but instead swarms of microbes over millions of years that  
• Cnot produced by the accepted methods of ore formation but swarms of microbes over millions of years that  
• Dproduced not by the accepted methods of ore formation but by swarms of microbes that over millions of years  
• Eproduced not by the accepted methods of ore formation but that swarms of microbes over millions of years