Answer:
advertisement should be nice and attractive to get attention of people
Explanation:
1) the quality of purchased good may be low
2) there might me fraud and cheaters
3) it might be risky
4) we may not get our orders on time
Answer:
B. Firewall
Explanation:
Firewall, just like encryption prevents unauthorized entry into a computer. However, Firewall can be implemented in both hardware or software form; or even a combination of both.
The oscilloscope is NOT a tool that would be considered appropriate equipment for on-site visits. The oscilloscope is an electronic test instrument used to observe observation constantly varying signals. This instruments is used in laboratories, and not on-site visits.
All other instruments are moveable and can be used on-site.