Which sentence uses 'opaque' correctly?

• A. The glass was transparent, making it possible to see through.
• B. The glass was translucent, somewhat see-through.
• C. The glass was opaque, making it impossible to see through.
• D. The glass was reflective, shiny.

Answer: (C)

Opaque means a material that does not let light pass, so you can’t see through it. The sentence describing the glass as opaque matches this idea: it says it’s impossible to see through the glass, which is exactly what opaque implies. By contrast, transparent means you can see through clearly, translucent means you can see through but not clearly, and reflective describes a shiny surface that bounces light but doesn’t inherently address viewing through. So the statement about the glass being opaque best fits the meaning.