If an Op-Amp's Output Increases 8 V Every $\mu \mathrm { s }$

Multiple Choice

If an op-amp's output increases 8 V every 12 $\mu \mathrm { s }$
in response to a step input voltage, the slew rate equals_____

A) 0.667 $\mathrm { V } / \mu \mathrm { s }$
B) 96 $\mathrm { V } / \mu \mathrm { s }$
C) 0.75 $\mathrm { V } / \mu \mathrm { s }$
D) 1.5 $\mathrm { V } / \mu \mathrm { s }$