Answer:
"But Williams and her sister Venus have already created a legacy by inspiring more African-American children - especially those from low-income areas - to play tennis. The sisters have championed a tennis centre in the Anacostia neighbourhood of Washington, DC, devoting time and money to it's development." - www.bbc.com
In such a large area, and little technology, communication was slow and at times ineffective. Much of the communication was done by word of mouth so some information would be lost. While today we have cell phones, email, and phone calls, which are direct and quick.
I believe the answer is intermittent reinforcement.
intermittent reinforcenet refers to the process of imposing operant conditioning in which the reinforcement is being done in a random time.
The purpose of doing intermittent reinforcement is to make them able to push the subject into doing things to even if they receive no reward for it.<span />
High School Studies. Engineering school<span> admission requirements typically include a high school diploma with a full menu of </span>math<span> and </span>science<span> courses, plus humanities and </span>computer studies. High school preparation should including geometry<span>, </span>trigonometry<span>, </span>algebra<span> and </span>calculus<span>, plus </span>physics<span>, </span>chemistry<span> and </span><span>biology.</span>
Rome’s first civil war began as the result of conflict between:
A. Rival military leaders
Rival general’s Gaius Marius and Lucius Cornelius Sulla conflict caused the first Roman Civil War.