Concept:Adjectives in English follow a fixed order: opinion, size, age, shape, color, origin, material, purpose.
Explanation:The adjectives given are: expensive (opinion), red (color), and Japanese (origin).
According to the standard adjective order, opinion comes before color, and color comes before origin.
Therefore, the correct sequence is: expensive, red, Japanese.
Since "expensive" begins with a vowel sound, the article "an" is used.
Thus, the correct phrase is "an expensive red Japanese car".
Answer:D. an expensive red Japanese car