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: the mass of a planet causes the pull of gravity on that planet, Fact2: Well, weight is the force on a object caused by gravity trying to pull the object down., Question: The mass of a planet causes the what? (A) harmful substances (B) global warming (C) weight of objects (D) It gets heated up (E) heat energy (F) to move people (G) kinetic energy (H) flow of electrons
C

Fact1: most canyons are formed by flowing rivers through erosion over long periods of time, Fact2: Canyon formed as a consequence of river erosion., Question: what does erosion form? (A) valleys (B) Sediment (C) mountains (D) canyons (E) soils (F) hills (G) soft soil (H) loose soil
D

Fact1: gases from burning coal and oil dissolving in water in the atmosphere causes acid rain, Fact2: An acid is defined as a compound which can donate a proton ., Question: What comes from burning coal and oil dissolving in water in the atmosphere? (A) Plant growth is reduced (B) A transportation fuel (C) Generating heat (D) harmful substances (E) DNA damage and mutations (F) A compound that donates proton (G) ozone depletion (H) Mutagenic chemicals

F