Why Did States Write Two Separate Treaties When Translating the UDHR

Why did states write two separate treaties when translating the UDHR into hard international law protecting human rights?

A) States wanted the rights protected in one treaty to be hard law and the rights protected in the other treaty to be soft law.
B) The negotiation over hard international human rights law got caught in the Cold War politics of the United States and Soviet Union.
C) Some states did not view many rights guaranteed in the UDHR as universal human rights.
D) Civil and political rights were viewed as too ambitious to implement,and many states advocated placing them in a separate treaty.