My answer is B. highest to the lowest.
In organizations especially in the military, the one who gives the order usually comes from the top position. It is transferred from the next to the highest position and passed until it reaches the lowest in rank.
Answer
Using a good circuit board PCB design and shielding techniques
Explanation
EMI is a disruptive electromagnetic energy that is released by one portion of the circuit and reaches other parts of the circuit via conducted or radiated parts.The energy can affect circuit performance or even damage brain cells when high.It is possible to reduce this effect by employing the method of shielding and ground planes to prevent interference with wireless system operations.
Supply and demand! The prices will rise until the supply will reach the demand.
A small community seems to be the best answer
