Use the Maximum/minimum Finder on a Graphing Calculator to Determine $$f ( x ) = x ^ { 4 } - 3 x ^ { 3 } - 21 x ^ { 2 } + 74 x + 30$$

Use the maximum/minimum finder on a graphing calculator to determine the approximate location of all local extrema.
- $$f ( x ) = x ^ { 4 } - 3 x ^ { 3 } - 21 x ^ { 2 } + 74 x + 30$$

A) Approximate local maximum at 1.694; approximate local minima at -3.044 and 3.722
B) Approximate local maximum at 1.702; approximate local minima at -3.155 and 3.676
C) Approximate local maximum at 1.604; approximate local minima at -3.089 and 3.735
D) Approximate local maximum at 1.576; approximate local minima at -3.004 and 3.752