To answer this question, the user needs to be familiar with the concept of Ajax-based solutions.

Ajax-based solutions provide several advantages, such as:

A. Reduces browser-compatibility issues: This is true because Ajax uses JavaScript and the XMLHttpRequest object, which are supported across multiple browsers. This means that developers can write Ajax code once and it will work consistently across various browsers.

B. Reduces page-refreshes, enhancing user experience: This is true because Ajax allows developers to update parts of a web page without reloading the entire page. This means that the user can interact with the website without experiencing the lag of a page refresh.

C. Increases security of browser-based applications: This is false. Ajax-based solutions do not inherently increase the security of a web application. However, they can be used in conjunction with other security measures to improve overall security.

D. Works even when JavaScript is disabled: This is false. Ajax relies on JavaScript to function properly. If JavaScript is disabled, Ajax will not work.

Therefore, the correct answer is:

The Answer is: B. Reduces page-refreshes, enhancing user experience.