单选题 When Nick Holonyak set out to create a new kind of visible lighting using semiconductor alloys, his colleagues thought he was unrealistic. Today, his discovery of light - emitting diodes, or LEDs, ae used in everything from DVDs to alarm clocks to airports.
Nick Holonyak' s colleagues thought it was possible to invent a new kind of visible lighting.

• A. Right
• B. Wrong
• C. Not mentioned