To answer this question, let's go through each option to understand why it is correct or incorrect:
Option A) It defines the standard tag that works the same everywhere - This option is incorrect. JSP tag libraries do not define standard tags that work the same everywhere. Instead, they provide a way to create custom tags that can be used in JSP pages.
Option B) It is a single library and we can use it in multiple JSP containers - This option is incorrect. JSP tag libraries are not a single library that can be used in multiple JSP containers. Each JSP container may have its own set of supported tag libraries.
Option C) It has support for the common structural tasks like iteration and condition - This option is correct. JSP tag libraries often provide support for common structural tasks like iteration (looping through a collection of items) and condition (performing conditional checks).
Option D) All of the above - This option is correct. The statement "All of the above" is true because JSP tag libraries do provide support for common structural tasks, and while they may not define standard tags that work the same everywhere, they can be used in multiple JSP containers depending on their compatibility.
Therefore, the correct answer is option D) All of the above.