Answer:
A. declines in labor productivity
Explanation:
Many people use relative location on a daily basis by using B) their mental maps of an area.
You know what a certain area looks like, at least approximately, so you don't need to use these other options on a day to day basis. You can rely on your mental maps to do the work for you.
Answer:
Array, pointers, struct, and union are the derived data types.
