Differentiate the Function and Find the Slope of the Tangent $$\mathrm { s } = 2 \mathrm { t } ^ { 4 } - 2 \mathrm { t } ^ { 3 } , \mathrm { t } = - 1$$

Multiple Choice

Differentiate the function and find the slope of the tangent line at the given value of the independent variable.
- $$\mathrm { s } = 2 \mathrm { t } ^ { 4 } - 2 \mathrm { t } ^ { 3 } , \mathrm { t } = - 1$$

A) 14
B) $- 14$
C) $- 2$
D) 2