Suppose a Doctor Spends Half of the Year in the United

Suppose a doctor spends half of the year in the United States and the other half in Canada and works in both places.How does his production get allocated between U.S.and Canadian GDP?

A) Half of the doctor's income counts toward U.S.GDP and half toward Canadian GDP.
B) The full income is counted in the GDP of the country in which the doctor is a permanent resident.
C) The full income gets counted in both U.S.GDP and Canadian GDP.
D) The value of the services produced in the United States gets counted in U.S.GDP and the value of the services produced in Canada gets counted in Canadian GDP.