Answer:
B). A traveller's tale.
C). A conte philosophique.
D). An early work of science fiction.
Step-by-step explanation:
Micromegas by Voltaire is popularly described as an early work of science fiction as it evolved in 1752 which was a bit early for such genre. The novella is also categorized as a traveler's tale as it elaborates the travel of Micromegas to the universe which is a key feature of travel genre(a journey through space and time with an epic scale description). It would also be categorized as 'a Conte philosophique'(philosophical fiction) as it exemplifies the humans interrogating the philosophies of Locke, Descartes, etc. as in discursive philosophy. Thus, options B, C, and D apply to 'Micromegas'.