Final answer:
Influenza during pregnancy has been linked to an increased risk of schizophrenia in offspring.
Step-by-step explanation:
Among the options provided, the prenatal infection that can be linked to an increased risk of schizophrenia is influenza. Research studies have shown that maternal exposure to severe influenza during pregnancy has been associated with a higher risk of offspring developing schizophrenia. For example, a study published in the Archives of General Psychiatry in 2004 found serologic evidence linking prenatal influenza to the etiology of schizophrenia. This suggests that it is important for pregnant women to take precautions to minimize the risk of influenza infection during pregnancy.