Retraining is required at intervals of or less.

a)

6 months

b)

18 months

c)

3 years

d)

6 years

Retraining is required at intervals of 6 months or less.

A)  6 months

Explanation:

Retraining can be defined as the process of making employees aware of the new technologies, strategies, and getting them a hands-on approach so that they can incorporate them into their allotted work.

For the healthy and smooth functioning of an enterprise, retraining should be done in after short intervals of time like six months.

Retraining ensures that the employees not only are aware of new inventions, but they are also able to follow the trends of the market and retraining also allows them to test their current knowledge and application of acquired skills.

well cos like a ds it doesn't really die out, unlike for example, fifa, they always come out with a new version, so lets say your fifa 18 is charging you to update the teams and stuff, so, if messi were to go to real madrid (never gonna happen) it would switch messi to the other team, until the owners of fifa come out with fifa 19, then the game would eventually stop updating, and back to the ds, it doesn't really stop working after sometime because there's lots of things that it could be used for, and idk if u know what i'm saying, but long story short, samsung, represents the ds, if they still work, and people love them but not the new version, the old version still works, so they don't really force people to buy new phones, get me?