The correct answer is (d).
Austria’s total nitrogen (N) excretion value for swine when summed across animal waste management system (AWMS) types is 53 percent lower than the product of population multiplied by N excretion per head.
Luxemburg did not report data on N excretion values for any animal waste management system and no values for N excretion per head for any animal species.
For Slovakia, there is no value for the N excretion per head for swine in CRF Table 4.B(b).