 <translate> A valid contract has to be?
Options:
- signed
- revised
- rejected
- written in blood
- written on paper
Let's think carefully first. Step-by-step reasoning process: <yor> Àdéhùn tó bófin mu gbọ́dọ̀ wà? Àwọn àyè: - tí a fọwọ́ sí - àtúnṣe - tí a kò gbà - tí a fi ẹ̀jẹ̀ kọ - tí a kọ sórí ìwé Ẹ jẹ́ ká kọ́kọ́ ronú dáadáa. Ìgbésẹ̀ ìmọnúúrò ní ṣísẹ̀-n-tẹ̀lé: 