The polynomial function f(x) = 3x5 – 2x2 + 7x models the motion of a roller coaster. The roots of the function represent when the roller coaster is at ground level. Which answer choice represents all potential values of when the roller coaster is at ground level? Begin by factoring x to create a constant term. 0, Plus-or-minus one-seventh, Plus-or-minus1, Plus-or-minus three-sevenths, Plus-or-minus3 0, Plus-or-minus one-third, Plus-or-minus1, Plus-or-minus seven-thirds, Plus-or-minus7 Plus-or-minus one-seventh, Plus-or-minus1, Plus-or-minus three-sevenths, Plus-or-minus3 Plus-or-minus one-third, Plus-or-minus1, Plus-or-minus seven-thirds, Plus-or-minus7