Question

If you were on Mercury the planet, which planet would be visible in the night sky?

Answer 1

which planet, singular, just one planet? Why not more?

Answer 2

For example, the next closest planet (on average around an orbit) is Venus. So yes to Venus.

But why not then Earth, and then Mars and Jupiter and Saturn?

Answer 3

Venus, because out of all the planets, Venus is the brightess.