He had social achievements to showcase. hope this helps.
Prepositions<span> perform three formal </span>functions<span> in </span>sentences<span>. They </span>can<span> act as an adjective modifying a noun, as an adverb modifying a verb, or as a nominal when used in conjunction with the verb form to be.</span>
If you look real close you would see that the answer is a.complex