The Golden Gate, painting a bright red-orange called "International Orange", requires repainting

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

The Golden Gate, painting(A)  a bright red-orange called(B)  "International Orange", requires repainting(C)  every year because of(D)  the salty, corrosive air.