The factor
If a factor has an odd multiplicity, the graph of the polynomial will cross the x-axis at that root. If the factor has an even multiplicity, the graph will touch the x-axis at that root but will not cross it.
Without additional information about how the graph behaves at the root or other factors of the polynomial, any positive integer (1, 2, 3, ...) could be a possible multiplicity for the factor
If you are provided with specific options, please share them for a more focused answer. Otherwise, the multiplicity could be any positive integer.