What type of value is returned by the `every()` method?

The every() method is designed to evaluate whether all elements in an array satisfy a specific condition defined by a provided testing function. When invoked on an array, it executes that function for each element, and if all elements pass the test (i.e., the function returns true for every element), the method returns a single boolean value of true. However, if at least one element fails the test (where the function returns false), the method will return false.

This behavior makes every() especially useful for validating criteria across a set of items in an array, where you want to ensure that all items conform to a set condition. Since it returns a singular boolean result indicating the overall outcome of the evaluation—either all elements meet the condition or they don't—it correctly returns a single boolean value.

In contrast, the other options suggest varying forms of return types that don't align with the actual functionality of every(), such as returning an array or being undefined.