 
 <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: <ibo> Nkwekọrịta dị irè ò kwesịrị ịdị? Nhọrọ: - bịanyere aka na ya - e degharịrị edegharị - jụrụ - nke e ji ọbara dee - e dere n'akwụkwọ Ka anyị buru ụzọ chee echiche nke ọma. Nzọụkwụ site na Nzọụkwụ Ntụgharị uche: 