A Teenager and Her Friends Go to the Lake and Spend

A teenager and her friends go to the lake and spend the day swimming and picnicking.Later that evening, she starts to feel sick.She complains of a headache and general malaise.The next morning, she is very ill and is rushed to the emergency department.Many neurologic changes are noted.Despite the staff's best efforts, the teenager dies.Autopsy reveals the presence of small protozoans in her brain tissue.What is the most probable organism that caused her death?

A) Acanthamoeba spp.
B) Naegleria fowleri
C) Balamuthia mandrillaris
D) Angiostrongylus cantonensis