A form defines A. where data is placed on the screen B. the width of each field C. both (a) and (b) D. All of the above E. None of the above

where data is placed on the screen
the width of each field
both (a) and (b)
All of the above E. None of the above

The correct answer is: C. both (a) and (b)

A form is a user interface element that allows users to enter data into a database or other application. It consists of a set of fields, each of which has a label and a data type. The fields are arranged in a layout, which defines where they are placed on the screen and how they are displayed. The width of each field is also defined in the layout.

Option A is correct because the layout of a form defines where data is placed on the screen. Option B is correct because the layout of a form also defines the width of each field.

Option D is incorrect because it includes option C, which is already the correct answer. Option E is incorrect because it is the opposite of the correct answer.