Which of the Following Statements Regarding Schistosomiasis Is Incorrect

Which of the following statements regarding schistosomiasis is incorrect?

A) There is only a single drug available to treat Schistosoma infection, praziquantel, and drug-resistant strains are beginning to arise.
B) Once a person has recovered from an infection with Schistosoma mansoni, they are protected with lifelong immunity.
C) Efficacy of treatment is assess by observing fecal samples placed in water for whether eggs can hatch to release live miracidia.
D) Schistosomiasis is transmitted by exposing the skin to a water source that has been contaminated with sewage.