Use a Graphing Utility to Select the Correct Graph of ​

Multiple Choice

Use a graphing utility to select the correct graph of ​ $y _ { 1 }$ and $y _ { 2 }$ in the same viewing window.Use the graphs to determine whether $y _ { 1 } = y _ { 2 }$ .Explain your reasoning.​ $y _ { 1 } = \cos ( x + 4 ) , y _ { 2 } = \cos x + \cos 4$ ​

A) ​ No, $y _ { 1 } \neq y _ { 2 }$ because their graphs are different.
B) ​ No, $y _ { 1 } \neq y _ { 2 }$ because their graphs are Same.
C) ​ Yes, $y _ { 1 } = y _ { 2 }$ because their graphs are different.
D) ​ Yes, $y _ { 1 } = y _ { 2 }$ because their graphs are same.
E) ​ No, $y _ { 1 } = y _ { 2 }$ because their graphs are different.