After Reading the Paragraph Below, Answer the Question(s) That Follow(s)

After reading the paragraph below, answer the question(s) that follow(s) .
You have landed on a distant, Earthlike planet and are leading a team of scientists charged with discovering whether life exists there. Realizing how difficult it can be to define life on Earth, let alone on another planet, your team put together a list of criteria that should be met for something to be considered alive.
-How long do you think it would take to determine whether an extra-terrestrial potential life form was indeed alive?

A) one day
B) one week
C) one year
D) impossible to determine