The answer is.. SHOULD HAVE BEEN.
The answer is B. <span>One with multiple well-reviewed publications on the subject.</span>
Nobody plans it, it just happens
It is answer 4 because the other three are not related to space and even though there are volcanoes on other planet, that question is not as relevant as the other last two.
<span>I would say A because experiments are test to get results you have to test. :)</span>
