This question is about understanding the function of a relative clause. The correct answer is 'A' because the relative clause 'that I thought you might find interesting/useful' describes the few things being suggested, giving more information about what they are. Option B is incorrect because the relative clause does not indicate quantity. Option C is incorrect because it does not provide a reason for the action of suggesting, but rather describes the nature of the suggestions. Option D is incorrect because it does not show the action but describes the suggestions.