单选题 Which of the following does the passage imply about the notion that the universe may be based on a spherical geometry?

• (A) Of the three models of spatial curvature proposed by Einstein, only spherical geometry contradicts the Euclidean model.
• (B) The primary evidence for the notion is that that observers cannot see spatial flexure directly, but perceive it as gravitational attraction.
• (C) Space mapped on the spherical geometrical model may curve in one of three ways, as Einstein proposed.
• (D) Spheres typically contain only three dimensions, whereas most models of the universe attribute it at least four.
• (E) Scientists are skeptical, given that mass and energy quantities seem insufficient, yet ultimately do not know enough to dismiss the notion.