The correct answer is C. both (a) and (b).
A file manipulation language is a programming language that is used to create, read, update, and delete files. It can also be used to perform operations
on data within files, such as sorting, searching, and merging.APL is a functional programming language that is often used for scientific and mathematical computing. It is a very powerful language that can be used
to perform a wide variety of tasks, including data manipulation.A manager would use a file manipulation language such as APL to cause the computer to produce pre-computed information, such as ratios. For example, a manager could use APL to create a report that shows the sales for each product in each region. The manager could also use APL to perform screening and selection of data from the database. For example, a manager could use APL to select all of the customers who have purchased a product in the past 30 days.
Option A is correct because a file manipulation language can be used to produce pre-computed information. For example, a manager could use APL to create a report that shows the sales for each product in each region.
Option B is correct because a file manipulation language can be used to perform screening and selection of data from the database. For example, a manager could use APL to select all of the customers who have purchased a product in the past 30 days.
Option C is the correct answer because it includes both Option A and Option B.
Option D is incorrect because a file manipulation language can be used to perform both pre-computed information and screening and selection of data from the database.
Option E is incorrect because a file manipulation language is a programming language that is used to create, read, update, and delete files. It can also be used to perform operations on data within files, such as sorting, searching, and merging.