What can we conclude from the following output that shows a correlation between insomnia and psychological well-being (PWB)?

Correlations

	Insomnia	PWB
Insomnia Pearson Correlation Sig. (2-tailed) N	1 760	-.423** .000 760
PWB Pearson Correlation Sig. (2-tailed) N	-.423** .000 760	1 760

** Correlation is significant at the 0.01 level (2-tailed)

a)Increased PWB is associated with increased insomnia

b)People experience reduced insomnia to a significant degree

c)The sample generally experiences low levels of psychological well-being

d)Increased PWB is associated with reduced insomnia