Recently, photons and neutrinos emitted by a distant supernova, an explosion of a star, reached Earth at virtually the same time. This finding supports Einstein's claim that gravity is a property of space itself, in the sense that a body exerts gravitational pull by curving the space around it. The simultaneous arrival of the photons and neutrinos is evidence that the space through which they traveled was curved.

Question: Which statement most strengthens this reasoning?
Options:
A. Einstein predicted that photons and neutrinos emitted by any one supernova would reach Earth simultaneously.
B. If gravity is not a property of space itself, then photons and neutrinos emitted simultaneously by a distant event will reach Earth at different times.
C. Photons and neutrinos emitted by distant events would be undetectable on Earth if Einstein's claim that gravity is a property of space itself were correct.
D. Photons and neutrinos were the only kinds of particles that reached Earth from the supernova.
E. Prior to the simultaneous arrival of photons and neutrinos from the supernova, there was no empirical evidence for Einstein's claim that gravity is a property of space itself.
Answer: "B"