Concept:Adjectives in English follow a natural order before a noun.
Explanation:The sentence needs a logical adjective sequence before the noun "schools".
Opinion adjectives like "attractive" usually come before size or quality, but here "modern" (age) and "well-equipped" are commonly ordered as given.
Only option A places all adjectives correctly without commas misplaced.
The options in B, C, and D break the proper adjective order or insert commas incorrectly.
Answer:A. modern, attractive, well-equipped schools