The correct answer is: B. in standing upright position.
A vertical filing system is a type of filing system in which files or folders are kept in standing upright position. This type of filing system is often used in offices and other businesses, as it is efficient and easy to use.
Option A is incorrect, as files or folders are not kept one upon the other in a vertical filing system. This would make it difficult to access the files or folders that are at the bottom of the pile.
Option C is incorrect, as files or folders are not kept in packets or large envelopes in a vertical filing system. This would make it difficult to see the contents of the files or folders.
Option D is incorrect, as files or folders are not kept in a cupboard, divided into a number of small compartments in a vertical filing system. This would make it difficult to find the files or folders that you are looking for.