Which one of the following sentences would be a good topic sentence (first sentence) for the paragraph below? The Tbox 336 HD DVD Player is one of the cheapest ways to enjoy the next generation of DVD technology. It enables you to watch HD content on your HDTV with an HD DVD on your Tbox 336 system. All you have to do is install the software and connect the Tbox 336 HD DVD Player to your Tbox 336 console. You're ready to go! Enjoy the ultimate home theatre - it's better than broadcast, cable or even satellite HD.

Each paragraph is a self contained unit: the first sentence is the 'topic sentence'; the last sentence is the 'link sentence' and the remaining sentences develop the subject within each paragraph.

The 'topic sentence' introduces us to the subject of the paragraph and the 'link sentence' is a sentence that introduces the next paragraph: this ensures a smooth continuity in the text.