Answer:
1. Telegraph. Developed in the 1830s and 1840s.
2. Telephone
. Developed in 1849.
3. Radio
. Developed in the 1890s
4. Computer
. Developed between 1833 and 1871.
5. Television
. Developed in 1927
6. Computer Metworking
. The TCP/IP protocol was developed in the 1970s, and in 1972
7. Internet
. Developed in 1983 but the online world became more recognized in 1990, when the World Wide Web was invented.
The answer is A. the french and the english also explored north america
Because it simulates a word-of-mouth recommendation. In addition, a word of mouth promotion is important for every business as each contented customer can ox dozens of new ones your way. The word of mouth is the transient of information from an individual to individual by the oral message which could be as simple as influence somebody the period of a day.
The answer is D because you want to have a control group! Hope it helps!