He told me that . . . . . . . . blue was his favourite colour. A. a B. the C. this D. none of the above

The correct answer is: D. none of the above

The word “blue” is a common noun, which means it is not specific to any particular blue object. It is not a definite article (a or the), which are used to refer to specific objects. It is also not a demonstrative pronoun (this or that), which are used to refer to objects that are close to the speaker or listener.

In the sentence “He told me that blue was his favorite color,” the word “blue” is a predicate adjective. It modifies the noun “color,” which is the object of the verb “told.” The sentence means that the person told the speaker that his favorite color is blue.

Here are some examples of how the words “a,” “the,” and “this” are used:

• I saw a blue car. (The word “a” is used to refer to a general blue car.)
• I saw the blue car. (The word “the” is used to refer to a specific blue car that the speaker has already mentioned.)
• I saw this blue car. (The word “this” is used to refer to a blue car that is close to the speaker.)