Answer D. Capital punishment is now legal in 32 states.
While the annual number of US executions peaked in 1999 (98 executions), the number of annual executions has fallen steadily since then. For example, in 2016, 20 inmates were executed.
Thus, the 1990s can be considered a high-water mark for support of the death penalty, as well as for imposing it. Note that this period followed a 4-year moratorium as well as the law-and-order period of the 1980s.
Stepping back and attempting to take stock, there appears to be a recurring sine wave of support for the death penalty over time. In the mid-1960s, public support descended to about 47%, then rose again to about 80% in the mid-1990s.1 In 2016, support went back down to 49%.
For more on this topic, see Mental Illness and Capital Punishment: Potential Complications, on which this quiz was based.
1. Oliphant B. Support for Death Penalty Lowest in More Than Four Decades. Pew Research Center; September 29, 2016. http://www.pewresearch.org/fact-tank/2016/09/29/support-for-death-penalty-lowest-in-more-than-four-decades/. Accessed May 5, 2017.