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A train traveling at a speed of $s$ miles per hour applies its brakes before a buffer stop. Assuming $d \geq 0$ and $s \geq 0$, the distance, $d$, in yards from the train to the buffer stop once the train comes to rest is:$\newline$$$d=0.5(-s^{2}-1.2s+184)$$$\newline$Which of the following equivalent expressions for $d$ contains the traveling speed of the train, as a constant or coefficient, for which the train rests right at the buffer stop after applying its brakes?$\newline$Choose $1$ answer:$\newline$(A) $-0.5s^{2}-0.6s+92.3$$\newline$(B) $-0.5(s-13)(s+14.2)$$\newline$(C) $-0.5(s+0.6)^{2}+92.48$$\newline$(D) $(6.5-0.5s)(s+14.2)$