A quark-gluon plasma, a hypothesized phase of quantum chromodynamics of interest to physicists, is supposed to exist at conditions of extremely high temperature or density that never naturally occur on Earth. The conditions engendering quark-gluon plasma were thought to have occurred in the first hundred microseconds or so of the universe. It follows that physicists will never be able to observe quark-gluon plasma.
Which of the following, if true, most seriously weakens the argument above?
【选项】
The temperature of quark-gluon plasma is believed to be 4 billion degrees Celsius.
选项是否正确？