A, Control inflation through monetary policy.
Answer:
The compass
Explanation:
A compass can be defined as an electronic or magnetic instrument (device) designed and developed to determine cardinal location and direction from a reference point. It is embedded with the four cardinal points of the Earth; north, west, south and east.
The compass was a piece of technology which allowed the Portuguese to set up their trade empire throughout the Indian Ocean region.
Basically, it was used to find their bearing and direction.