In this task, you are given two facts, and a multiple-choice question. Based on the given facts, answer the question with index of the correct option (e.g, "A").

Fact1: building housing developments usually requires replacing animal habitats, Fact2: For salmon, habitat includes freshwater, estuarine and marine habitat., Question: What animal would not have its territory covered over by a housing development? (A) humans (B) bullfrogs (C) Frogs (D) raccoon (E) pigeons (F) salmon (G) opossum (H) deer
F

Fact1: Plasma cells are activated B cells that secrete antibodies., Fact2: Antibodies are produced by plasma cells., Question: antibodies are produced by activated B cells that do what? (A) Animal survival (B) killing insects (C) interact (D) secrete them (E) migrate (F) reproduce (G) competition (H) Allergies
D

Fact1: pollutants have a negative impact on the environment, Fact2: Environment and Health Environment and Health All living things depend on their environment., Question: pollutants have a negative impact on all what (A) tractors (B) circulatory systems (C) near the shoreline (D) living things (E) Electrical energy (F) pavement (G) potholes (H) important habitats
D