单选题 It can be inferred from the passage that scientists are currently making efforts to observe which of the following events?

A、 The decay of a vacuum in the presence of virtual particles.
B、 The decay of a vacuum next to a super heavy atomic nucleus.
C、 The creation of a superheavy atomic nucleus next to an intense electric field.
D、 The creation of a virtual electron and a virtual positron as a result of fluctuations of a vacuum.

【正确答案】 B

【答案解析】[解析]文章最后两句话：in the immediate vicinity of a super heavy atomic nucleus，one with about twice as many protons as the heaviest natural nuclei known．A nucleus that large cannot be stable，but it might be possible to assemble one next to a vacuum for long enough to observe the decay of the vacuum．Experiments attempting to achieve this are now under way。故应选B。