According to macroeconomic theory, evidence that high unemployment may be accompanied by low inflation,
and low unemployment may be accompanied by high inflation is supported by the:
a. neoclassical expenditure-output model.
b. keynesian cross diagram.
c. keynesian phillips curve tradeoff.
d. keynesian inflation trade-off model

C. Keynesian Phillips curve tradeoff.

Explanation:

In the border of the Phillips curve of Keynesian macroeconomics, there is an explanation that links unemployment and inflation through a tradeoff. In times of high inflation, the economy is hot and companies are labor-intensive, so unemployment is low. However, when recessionary inflationary policies are adopted, consumption and economic activity decline, causing firms to lay off employees to adjust to the new reality of the consumer market.

The database system allows the creation of a single depository of information, which is updated periodically and which can be used simultaneously by many users, since this type of system allows the effective sharing of all data stored in its depository . In addition, this is a secure system and is very difficult to break into. This is because of the efficiency of the software used to maintain it. However, the use of these softwares can be a little complicated for users, in addition to requiring a high economic cost to obtain them.

The traditional file system, in turn, each user must obtain their own file related to the application they want to run. This may seem dull in comparison to the database, but it is advantageous as it does not require any spending on software, as it is simple and there are several cheap and efficient tools and editors on the market. However, this system is not so safe, it can cause isolation of data and even data inconsistency, which disrupts the entire system.