How did scientists discover that the Bajau people's ability to hold their breath for long periods is linked to increased spleen size?
They used a clue from seal research and then compared the Bajau people's spleens
to those of their neighbors, the Saluan.
O They used interviews with Bajau people of different ages and sexes before taking
samples of their blood to test their DNA.
They traced the evidence of natural selection throughout the 1,000-year history of
The Bajau people's diving practice.
They traced the amount of red blood cells in the bodies of Bajau people before and
after diving for long periods of time.