The sentence that contains coordinate adjectives that should be separated by commas is:
B. The two tall men were guarding the door.
In this case, "two" and "tall" serve different roles, but if there were two adjectives of equal weight that described the men, such as "large, strong men," they would be separated by a comma. Since "two" is not an adjective that necessitates a comma with "tall," it doesn't actually fit the criteria of coordinate adjectives. None of the options provided truly fit the typical use of coordinate adjectives that would require commas.
To clarify: coordinate adjectives are those that equally modify a noun and can be joined by "and" or rearranged. In your provided responses, none of the sentences contain coordinate adjectives that require a comma.