The Table Below Shows the Number of Years of Jail

The table below shows the number of years of jail time that two burglars, Alf and Doug, will receive, depending on whether each decides to confess and implicate his partner, or to remain silent.

$\begin{array}{}& \text {Doug's Strategies }\\ \text {Alf'sStrategies }&\begin{array} { |l|c|c| } \hline & \text { Confess } & \begin{array}{c}\text { Don't } \\\text { Confess }\end{array} \\\hline \text { Confess } & \begin{array}{c}\text { Doug: 4 } \\\text { A.f: } 4\end{array} & \begin{array}{c}\text { Doug: } 9 \\\text { A.f: 0 }\end{array} \\\hline \text { Don't } & \text { Doug: 0 } & \text { Doug: 1 } \\\text { Confess } & \text { Alf: } 9 & \text { A.f: 1 } \\\hline\end{array}\\\end{array}$
-If both prisoners are allowed to confer before being questioned and decide to cooperate,they:

A) each remain silent and receive a sentence of one year
B) each confess and receive a sentence of one year
C) each confess and receive a sentence of 4 years
D) each remain silent and receive a sentence of 4 years
E) both confess and are both set free