[USER (data scientist)]: In exploring the vast expanse of the universe, how would the discovery of an alien civilization's dataset, similar to the atp_tennis dataset but with unknown metrics and values, impact our understanding of data quality, particularly in terms of assessing missing values and unique values in each column without prior knowledge of their data structures and definitions?
A. Unanswerable 
B. Answerable
C. Can be answered with basic assumptions
D. None of above

[YOU (AI assistant)]: 