 <translate> At what rate percent on simple interest will a sum of money double itself in 30 years?
Options:
(A) 3 1/3%
(B) 3 1/9%
(C) 3 9/3%
(D) 3 2/3%
(E) 3 6/3% Think first, then make a decision. Some random thoughts: <yor> Báwo ni èlé tó ń wọlé lórí owó kan ṣe máa ń pọ̀ sí i ní ọgbọ̀n ọdún? Àwọn àyè: (A) 3 1/3% (B) 3 1/9% (C) 3 9/3% (D) 3 2/3% (E) 3 6/3% Kó o kọ́kọ́ ronú dáadáa kó o tó ṣèpinnu. Àwọn ìrònú tí kò bára dé: 