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Which recursive formula can be used to define this sequence for $n > 1$?$\newline$$15, 13, 11, 9, 7, 5, \ldots$$\newline$Choices:$\newline$$[A] a_n = a_{n - 1} - 2$$\newline$$[B] a_n = a_{n - 1} + a_{n - 2} + 2$$\newline$$[C] a_n = \frac{13}{15}a_{n - 1}$$\newline$$[D] a_n = -\frac{1}{2}a_{n - 1}$