Glycolysis is a pathway in which one six-carbon molecule of glucose is oxidized to produce two three-carbon molecules of pyruvic acid. The pathway can be condensed into the following four main steps. Step 1. Two phosphate groups are attached to one molecule of glucose, forming a new six-carbon compound. The phosphate groups are supplied by two molecules of ATP, which are converted into two molecules of ADP in the process.

Step 2. The six-carbon compound formed in Step 1 is split into two three-carbon molecules of glyceraldehyde 3 - phosphate (G3P)

Step 3. The two G3P molecules are oxidized, and each receives a phosphate group. The product of this step is two molecules of a new three-carbon compound. The oxidation of G3P is accompanied by the reduction of two molecules of NAD+ to NADH. NAD+ is an organic molecule that accepts electrons during redox reactions.

Step 4 The phosphate groups added in Step 1 and Step 3 are removed from the three-carbon compounds formed in Step 2. This reaction produces two molecules of pyruvic acid. Each phosphate group is combined with a molecule of ADP to make a molecule of ATP. Because a total of four phosphate groups were added in Step 1 and Step 3, four molecules of ATP are produced.

Which of these describes how the author structured the text to present information to the reader?
A ABAB rhyming B comparing and contrasting C cause and effect D sequencing information
B comparing and contrasting C cause and effect D sequencing information