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: Centrioles are organelles involved in cell division., Fact2: Mitosis is cell division., Question: What are organelles involved in mitosis? (A) animals (B) Conifers (C) Most plants (D) it needs them (E) graptolites (F) fur seals (G) centrioles (H) sensory neurons
G

Fact1: acid rain has a negative impact on water quality, Fact2: Sulfur dioxide causes acid rain., Question: What has a negative impact on water quality? (A) Reverse osmosis (B) fossil fuels (C) Fresh water (D) Carbon filter (E) chlorofluorocarbons (F) Sulfur dioxide (G) Pollution (H) harmful substances
F

Fact1: a delta is formed by deposition of sediment at the mouth of a river by water fanning out, Fact2: Deltas and estuaries are important habitats., Question: what is formed by deposition of sediment at the mouth of a river? (A) A solid geometric shape (B) clouds (C) h2o (D) important habitats (E) dams (F) patch reefs (G) swamp vegetation (H) at or near the margins

D