What type of technical writing is used in this passage?

Scientists studied sediment cores, or layers of material settled at the bottom of a body of water, in three lakes on the Artic Coastal Plain (ACP) to understand changes in mercury accumulation over the past 100 years. Mercury accumulation in two of the three lakes was variable and high over the past century. Mercury accumulation in the third lake was lower. It was also strongly related to sediment mercury concentration rather than sedimentation rate. Sediment mercury concentrations were related to measures of sediment composition and VRS-inferred chlorophyll.

A.
technical summary
B.
technical manual
C.
technical analysis
D.
technical description
E.
technical instruction