Mt. St. Helens, in the state of Washington:.A. Is a broad, flat shield volcano, different from the steep strato-volcanoes that are seen above sea level in Hawaii. B. Is a medium-to-high-silica andesitic volcano, different from the lower-silica basaltic volcanoes of Hawaii. C. Is a low-silica basaltic volcano, different from the andesitic volcanoes of Hawaii. D. Has only experienced one eruption, on May 1, 1980, in the same way that a Hawaiian volcano experiences only a single eruption. E. Is a broad, flat flood basalt, different from the steep strato-volcanoes of Hawaii.