Statement: There is no reason to rule out the possibility of life on Mars. Therefore the exploration of that planet has to be undertaken.
Assumptions:
1. There is life on Mars.
2. The search for life is the sufficient reason for space exploration
Answer: E
According to the statement, the possibility of life on Mars cannot be ruled out. So, I is implicit. Also, the statement mentions that the planet should be explored to probe for any life present. So, II is also implicit.