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: satellites are used to take images from space, Fact2: Satellite images are digital photographs., Question: Satellites are used to take what from space? (A) rapid changes occur (B) snow, ice, and rock (C) trees and flowers (D) painters (E) occurs over a wide range (F) digital photographs (G) digital files (H) photographers
F

Fact1: soil is formed by rocks eroding, Fact2: Rivers erode the rocks they flow over., Question: What is formed by rivers? (A) fish (B) soil (C) rain (D) bamboo (E) spring (F) clouds (G) kayaks (H) NaCl
B

Fact1: Echinoderms have a unique water vascular system with tube feet., Fact2: Echinoderms have a hydraulic system of locomotion called the water vascular system., Question: How do echinoderms use their feet to locomote themselves? (A) one at a time (B) to move people (C) running and lifting (D) protein channels (E) a hydraulic system (F) it needs them (G) undulations (H) It helps them survive

E