You are given a science question (easy-level) and four answer options (associated with "A", "B", "C", "D"). Your task is to find the correct answer based on scientific facts, knowledge, and reasoning. Do not generate anything else apart from one of the following characters: 'A', 'B, 'C', 'D'. There is only one correct answer for each question.

The first telescopes were invented hundreds of years ago. Which was discovered as a result of this invention?
(A) the moons of Jupiter (B) the bacteria that causes disease (C) the deep-sea trenches in the ocean (D) the parts of a plant that perform photosynthesis
A

Which property of proteins best allows them to perform an enormously diverse range of functions?
(A) their large, chemical-energy reserve (B) their large, stored-electric potential (C) the complexity of their folded structure (D) the wide variety of elements they include
C

In science, old ideas can be changed when new discoveries alter existing information. Which situation is most likely an example of a rethinking of an existing idea?
(A) using coal to generate electricity (B) discovering a new species of snake (C) developing an antibiotic to treat infections (D) changing the definition of the term planet
D