 <translate> Some question: A can do a piece of work in 20 days. B in 15 days A and C in 12 days. In how many days can A finish the work if he is assisted by B on one day and C on the next, alternately?
Options:
(A) 2 days
(B) 8 days
(C) 6 days
(D) 8 days
(E) 9 days
Some stream of consciousness: <yor> Ìbéèrè kan: A lè ṣe iṣẹ́ kan ní ogún ọjọ́. B ní ọjọ́ mẹ́ẹ̀ẹ́dógún A àti C ní ọjọ́ méjìlá Ọjọ́ mélòó ni A máa lò láti parí iṣẹ́ náà bí B bá ń ràn án lọ́wọ́ lọ́jọ́ kan, tí C sì ń ràn án lọ́wọ́ lọ́jọ́ kejì? Àwọn àyè: (A) Ọjọ́ méjì (B) Ọjọ mẹjọ (C) ọjọ mẹfa (D) Ọjọ mẹjọ (E) Ọjọ mẹsan Ìmọ̀lára kan: 