Answer:
D) It shifts from the subjunctive mood by using the verb 'were' to the indicative mood by using 'will buy'.
Explanation:
It's easy to detect mood changes in a sentence since they cause it to make no sense. The word 'were' creates a subjunctive mood, while the words 'will buy' create an indicative one. Here is the difference between the two:
Subjunctive mood - uncertainty, often expressing as a wish, desire, doubt or hope
Indicative mood - expresses things that are sure, certain, and (believed to be) true
I hope this helps!