If a large amount of skilled labor immigrated into the country, which allows the available resources to produce more of goods X and Y, which of the following will occur?
A.the y-intercept of the ppf will rise, and the y-intercept of the ppf will fall
b. the y-intercept of the ppf will rise, and the y-intercept of the ppf will rise
c. the y-intercept of the ppf will fall, and the y-intercept of the ppf will fall
d.the y-intercept of the ppf will fall, and the y-intercept of the ppf will rise
d.