Lets eliminate
A. organ transplant:
this was debated maybe 200 years ago (give or tak) and is no longer an issue
B. genetic engineerign
this is kind of debated becuase some scientists are trying to make life and that has to do with ethics because they would be playing god
C. space exploration
not debatable
D. prosthetics
we already have this and tis i not debatable
answer is B
A Historian would look for a primary source (option d. ) - the definition of a primary source is that it was written at the time of the event, and not later (this is the secondary choice).
Theres many find it on google.
examples are Switzerland, US, Bhutan
Answer:
d..........................
The answer would be C. 27 million
