Lasers produce powerful, focused light that does not spread out with distance, which makes them very useful in manufacturing, communication, and medical
technologies. In surgical procedures, laser scalpels are sometimes used instead of traditional scalpels or knives. Because lasers can cut tissue without physically
touching it, they do not transmit infection. Laser scalpels also cause less scarring,

Why does the author use complex sentences?

A
to demonstrate the need for more research about lasers
B. to demonstrate an awareness of alternatives to lasers
C.
to connect related ideas about the uses and characteristics of lasers
D.
to illustrate the complicated nature of lasers in a variety of fields.