Why was the electric traffic signal invented?

Keep these two main factors in mind when selecting type for your business communicationsthe audience influences type choice.there are good types and bad types.type should be easily read.when your message is important type selection doesn't matter

Plz which of the following statements is the best definition of a blockade? a. a blockade is a group of soldiers recruited from a foreign country who serve for the money. b. a block it is a military tactic in which one army moves into place to face another army. c. a blockade is a wooden fence built to defend a colonial settlement. d. blockage is the shutting off of a port by ships to keep people or supplies from moving in or out.

What are the major problems with a command economy?