Which of the following are the primary box types?

What interesting kind(s) of question(s) could conceivably be answered by an associative search (in one access) that cannot be answered in a single direct-mapped search?

What will be an ideal response?

A _____is software that allows a web developer to use a collection of tools to build a web application, which simplifies the website building process.

A. ?web journal B. ?web validator C. ?web master  D. ?web framework