Final answer:
The sentence requires the adjectives "bleues, orange" to correctly describe the feminine and plural noun "valises".
Step-by-step explanation:
In the sentence "Tu vois mes valises? Elles sont bleues, orange.", the correct pair of adjectives to fill in the blanks are bleues, orange.
In French, adjectives must agree in gender and number with the noun they modify. Since "valises" is feminine and plural, the adjectives should also be feminine and plural.
Therefore, the correct answer is option C. bleues, orange.
Learn more about French adjectives