Fumaric acid, C4H4O4, can be extracted from plants and can be used as a substitute for citrus acid in fruit drinks. The percent composition by mass of fumaric acid is ________.
◦ C 33.33% H 33.33% O 33.33%
◦ C 39.80% H 6.68% O 53.52%
◦ C 40.00% H 6.67% O 53.33%
◦ C 41.39% H 3.47% O 55.14%
◦ C 0.25% H 0.25% O 0.50%