Choose the correct answer that complete these given words.
Laser / device / concentrate / light waves / intense beam.
A. Laser is a device which concentrates light waves into an intense light beam.
B. The laser is a device which concentrates light waves and an intense light beam.
C. Laser is a device concentrates light waves into an intense light beam.
D. The laser is a device to concentrate light waves to an intense light beam.
