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.

For a technology project, Kyle came up with an idea to build a model bridge. He wants his bridge to span 50 cm and to support a 1 kg object. According to the engineering design process, which of the following should be Kyle's next step?
(A) construct prototypes of different kinds of bridges (B) research the different designs of bridges (C) gather the materials needed to build the bridge (D) make a drawing to show how to build the bridge
B

What procedure should be performed after any handling of a plant sample in a lab?
(A) applying disinfectant to the counters (B) throwing away plant material in the trash (C) washing hands with an antibacterial soap (D) placing hands under an ultraviolet light
C

Ocean currents, prevailing wind patterns, and other atmospheric disturbances are initially caused by which of these?
(A) differences in the cycles of the Moon (B) gravitational pull of the Sun (C) incoming solar radiation (D) ozone layer depletion
C