Use the excerpt from the text titled making medicine from discovery to doctors to answer the question.
The first step is to scour Molecule banks which time he lives up in our curious other scientists have made. Intelligent computer programs, robots, and other state of the art tools help scientists Analyze thousands, sometimes millions, of molecules and discover those that may have the desired effect on our bodies.
Which phrase from the excerpt signals that this is a chronological text?
A. Sometimes millions
B. Scientists have made
C. The desired effect
D. The first step