what is the structural formula of Fumaric acid ?

Options

A. `{:(" "H-C-COOH),(" ||"),(HOOC-C-H):}`
B. `{:(H-C-COOH),(" ||"),(H-C-COOH):}`
C. `{:(H_3C-C-COOH),(" ||"),(H_3C-C-COOH):}`
D. `{:(" "H_3 C -C-COOH),(" ||"),(HOOC-C-CH_3):}`