Computers and Laser Scanners Are ________ for Low-Skilled Labor and ________

Computers and laser scanners are ________ for low-skilled labor and ________ for high-skilled labor. The introduction of these technologies ________ the wage rate of high-skilled workers and ________ the wage rate of low-skilled workers.

A) complements; substitutes; raises; lowers
B) substitutes; complements; lowers; raises
C) substitutes; complements; raises; lowers
D) complements; substitutes; lowers; raises