How might the inward migration of a Jovian-like planet in an extrasolar planetary system alter the probability of life appearing on inner terrestrial planets?
A) it might improve chances slightly because some of the terrestrial planets may become moons of the Jovian planet
B) it might greatly decrease the chance because the orbits of the inner, terrestrial-like planets would be disrupted
C) it would make no difference at all
D) it might improve chances because it would protect inner, terrestrial-like planets from impacts
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