What are the possible rational roots of f(x) = 3x⁴- x³+ x²- x + 5?

Select one & explain please:

a.{1, 5}

b.{1/3, 5/3}

c.{1, 1/3, 5, 5/3}

d.{1, 1/5, 3, 3/5}

e.{1, 1/3, 5, 5/3}