Solve the Problem $t$ Is Given By $s ( t )$ Find the Instantaneous Velocity at the Indicated Value Of t

Multiple Choice

Solve the problem.
-The position of an object at time $t$ is given by $s ( t )$ . Find the instantaneous velocity at the indicated value of $t$ . $s ( t ) = - 7 - 5$ t at $t = 4$

A) 5
B) $- 27$
C) $- 5$
D) $- 7$