d)people and a)speech are common nouns
The common nouns in the sentence are 'speech' and 'people'. Options A and D are correct. 'President Roosevelt's' is a proper noun, 'American' acts as an adjective, and 'listened' is a verb.
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Jawaban:4,8Penjelasan dengan langkah-langkah:penjelasan ada di foto ya semoga membantu