Which of the following could be the equation of the function?
A
y is equal to negative 2 cosine open paren 4 times open paren x plus pi close paren close paren minus 1B
y is equal to 2 cosine open paren 4 times open paren x plus pi close paren close paren plus 2C
y is equal to 2 cosine open paren x plus pi close paren plus 1D
y is equal to negative 2 cosine open paren 2 times open paren x plus pi close paren close paren minus 1