B. Command economy
This is because this is exactly what. Command economy does
The answer to this question is Smartphones.
Smartphones have taken over the market all over the world during that period due to the flexibility of their usage.
It's held the capability to do almost any casual technology user do, which pretty much change the course of overall human behavior.
<span>A firm might lose its sales revenue and market share if it is unable to respond rivals market strategy to acquire market share. In the given case most probably the firm lost its market share to its rival due to their exerted efforts in one or more. </span>
<span>When it comes to saving money, what is a good rule of thumb?
</span>B.Put aside money for savings each month
Good luck! :)