Describe the transformation of f ( x ) = sin ⁡ x f(x)=sinx to g ( x ) = sin ⁡ ( x − π 4 ) g(x)=sin(x− 4 π ​ ). A. f(x) is shifted π 4 4 π ​ units down. B. f(x) is shifted π 4 4 π ​ units up. C. f(x) is shifted π 4 4 π ​ units to the right. D. f(x) is shifted π 4 4 π ​ units to the left.