In 2009,the U.S.Supreme Court ordered that California prison populations must be reduced to ______% of design capacity within two years.

A) 89.5
B) 123.5
C) 129.5
D) 137.5

In 2009, the U.S. Supreme Court ordered that California prison populations must be reduced to 137.5% of design capacity within two years. This ruling was in response to the overcrowding in California prisons, which was deemed to be a violation of the Eighth Amendment's prohibition on cruel and unusual punishment. The order was meant to ensure that prisoners had access to basic medical and mental healthcare, as well as other basic services. California has since made progress in reducing its prison population, but the state still faces challenges in providing adequate care to its incarcerated population.