Final answer:
The most effective marketing or sales message is clear and conveys benefits directly: 'The NuForm desk chair supports your lower back and relieves pressure on your legs.'
Step-by-step explanation:
When crafting a marketing or sales message, clarity, conciseness, and direct benefits to the consumer should be a priority. Among the options provided, 'The NuForm desk chair supports your lower back and relieves pressure on your legs.' is the best choice. This statement is clear, straightforward, and effectively communicates the value proposition of the NuForm desk chair.
In comparison, the other options either oversell the product with hyperbole, are too lengthy and overly detailed, or combine aesthetic appeal with functionality in a manner that may detract from the main message about comfort and support.