How Does the Shape of Water Employ Cinematic Verisimilitude

How does The Shape of Water employ cinematic verisimilitude?

A) by only using for its fantastic premise real scientific methods and procedures
B) by basing the film on real historical events
C) by reveling in artifice and not choosing to make its special effects look seamless or spectacular
D) by making the motivations of the cleaning woman and water creature specimen entirely implausible
E) by having the audience become emotionally invested in an interspecies romance between a cleaning woman and a water creature specimen in a government research center