¿qué oración no es cierta sobre nicaragua?

es peligroso comer peces de los lagos de nicaragua porque el agua esta contaminada.
hay pruebas ciertas de que los indígenas caminaron por la costa del lago managua.
el lago nicaragua que es el más grande, tiene fauna del mar caribe.

In English: A Mexican biological research center (1) to carry out a project in a mountainous area of Colombia. Six scientists from the center travel to that country for six months to investigate a population of monkeys. The scientific group (2) to monkeys with a contagious disease, and that's why its members (3) vaccinations before traveling. The community that awaits them (4) the details of the investigation when the experts arrive. In addition, the team (5) to the inhabitants measures of prevention against the disease. The scientific team expects the recovery of monkeys in the region and says that many new babies (6). They do not doubt that the disease (7) forever and the living condition of the monkeys (8) Scientists carry food (food) for expeditions outside the community, but in a few cases (9) edible birds that are not in danger of extinction. Surely, researchers (10) many useful data.