Meteorite explosions in the Earth's atmosphere as large as the one that destroyed forests in Siberia, with approximately the force of a 12-megaton nuclear blast, occur about once a century.The response of highly automated systems controlled by complex computer programs to unexpected circumstances is unpredictable.

Which of the following conclusions can most properly be drawn, if the statements above are true, about a highly automated nuclear-missile defense system controlled by a complex computer program?

【选项】It is not certain what the system's response to the explosion of a large meteorite would be, if its designers did not plan for such a contingency.