Five years ago, Scandia discovered massive reserves of natural gas and exploited this opportunity to drill for more gas by hiring the best engineers and employing all sorts of latest technologies. Last year, a new government was elected, and this government lowered daily wage-rates of workers. The workers protested and the country saw massive labour strikes in all sectors. Which factor determining foreign trade was compromised in this case?

a). Abundance of natural resources

b). Political stability

c). Availability of skilled human capital

d). Strong domestic infrastructure