题目内容：
Which of the following statements is true according to the passage?
A．Toxoplasma gondii causes people strange and deadly diseases. A．Toxoplasma gondii causes people strange and deadly diseases.
B．With certain infection the infectious disease cannot be cured completely.
B．With certain infection the infectious disease cannot be cured completely.
C．Human beings infected by toxoplasma gondii will have permanent brain damage.
C．Human beings infected by toxoplasma gondii will have permanent brain damage.
D．Toxoplasma gondii is harmful to human beings, but it does no harm to mice.
D．Toxoplasma gondii is harmful to human beings, but it does no harm to mice.
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