Which technology is shown in the photograph?
A. Negative controls
B. Gel electrophoresis
C. Biostimulation reaction
D. Polymerase chain reaction
![Which technology is shown in the photograph A Negative controls B Gel electrophoresis C Biostimulation reaction D Polymerase chain reaction class=](https://us-static.z-dn.net/files/d09/efc07dd1273619136ada9f3e1eb36427.png)