`1.A`

`-` Dẫn chứng :  The text provides information about the ways colours can affect us, as explored in Verity Allen's series.

`2.A`
`-` Dẫn chứng :  The text mentions Verity studying different aspects of colour, including health, products, and emotions. This option best fits the probable content.

`3.A`
`-` Dẫn chứng : Verity discusses how understanding colours can influence people's choices and buying decisions, which is important for selling products.

`4.B`
`-` Dẫn chứng : The writer expresses skepticism about the 'Colour Doctor,' who believes in curing diseases with coloured lights, showing the least respect for this individual's views.

`5.D`
`-` Dẫn chứng : The text advises viewers to be open to learning from the show but also to make their own judgments, making this title the most fitting.