Put the sentences in the correct order as explained in the experiment conducted by Sophie Chu:
A The natural variability in dissolved inorganic carbon was calculated between 2001 and 2012.
B This earlier estimate was subtracted from the 2012 estimate.
C Sophie ran a model with various water temperatures, salinity, oxygen use, and silicate.
D The researchers discovered that the northeast Pacific stored 11 micromoles per kilo of anthropogenic carbon.