Answer:
Option A, The following sentence contains correct punctuation:
They spent three days' vacation building terraces and landscaping the yard.
Step-by-step explanation:
The grammatical rule for the use of apostrophes in temporal expressions states that when the unit of time being used is one the apostrophe goes before the s. For example: one day's pay. But when the unit of time is more than one then the apostrophe goes after the s, as it is the case of the sentence in the question. They spent three days of their vacation building terraces, therefore the apostrophe goes after the s.