Which statement about malaria and sickle-cell anemia is correct? (1 point) A. Sickle-cell anemia is correlated with an increased incidence of malaria. B. Malaria causes a decreased incidence of sickle-cell anemia. C. Malaria is correlated with a decreased incidence of sickle-cell anemia. D. Sickle-cell anemia causes an increased incidence of malaria.

Which statement describes characteristics of planarians? a they live in oceans, are parasites, and reproduce only sexually. b they live in fresh water, are parasites, and reproduce only asexually. c they live in oceans, are free living, and reproduce sexually and asexually. d they live in fresh water, are free living, and reproduce sexually and asexually.