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Subject-verb agreement: “She doesn’t have.” Other options misuse verb forms. Correct: C.

“Sweating” on the can is liquid water forming from water vapor in the air. Warm, humid air near the can is cooled below its dew point by the cold surface. Water vapor loses energy and transitions from gas to liquid—condensation. Evaporation (A) is liquid to gas, the opposite process. Sublimation (C) is solid to gas without passing through liquid (e.g., dry ice). Deposition (D) is gas to solid (frost formation). HiSET Science emphasizes phase changes and energy transfer. The key is recognizing that the water originates from the air, not from inside the can. A quick mental model: when air is cooled, its capacity to hold water vapor decreases; excess vapor condenses on the nearest cool surface. This same principle underlies dew on grass and fogging of glasses when entering a warm, humid room from the cold. Therefore, B is correct.

The Sun emits electromagnetic radiation (visible light, infrared), which travels through space and warms Earth. Conduction (A) requires direct particle contact. Convection (C) circulates fluids, but not through space. Evaporation (D) is a process, not a transfer mechanism. HiSET emphasizes distinguishing energy transfer methods. Correct answer: B.

Standardized tests often prefer traditional agreement with singular antecedents. “Each” is singular, so “his or her” matches (B). Option A uses singular “Every runner” with plural “their,” which many modern style guides accept as singular “they,” but tests may still flag it. Option C similarly has “Each of the runners” (singular head “Each”) with “their.” Option D mismatches plural “All runners” with singular “his or her.” On the HiSET, prioritize unambiguous agreement; “his or her” ensures grammatical precision, though in real-world writing, singular “they” is widely acceptable. Correct answer: B.

Iron in hemoglobin binds oxygen in red blood cells. Without iron, anemia occurs. Calcium builds bones, sodium/potassium regulate nerves. On HiSET, major elements in body systems are tested. Correct: B.