Refer to the Following Payoff Table

Multiple Choice

Refer to the following payoff table:

There is an option of paying $100 to have research done to better predict which state of nature will occur. When the true state of nature is S1, the research will accurately predict S1 60% of the time. When the true state of nature is S2, the research will accurately predict S2 80% of the time.
Given that the research is done, what is the joint probability that the state of nature is S1 and the research predicts S1?

A) 0.08
B) 0.16
C) 0.24
D) 0.32
E) 0.36