Which answer choice shows the correct capitalization for the title in the following sentence?


In the summer of 1927, president Calvin Coolidge participated in the formal dedication of the massive stone monument known as Mount Rushmore, which was completed 14 years later.





A.
In the summer of 1927, president Calvin Coolidge participated in the formal dedication of the massive stone monument known as mount rushmore, which was completed 14 years later."




B.
In the summer of 1927, president Calvin Coolidge participated in the formal dedication of the massive stone monument known as mount Rushmore, which was completed 14 years later."




C.
In the summer of 1927, President Calvin Coolidge participated in the formal dedication of the massive stone monument known as Mount Rushmore, which was completed 14 years later."




D.
In the summer of 1927, President Calvin Coolidge participated in the formal dedication of the massive stone monument known as mount Rushmore, which was completed 14 years later."