2. Which of the following statements is correct?

(a) The May 1968 civil unrest in France lowered the education attainment of affected student cohorts but did not affect their future earnings.

(b) The Mariel Boatlift study finds that the mass emigration of Cubans lowered the wage of unskilled native workers but not college-educated workers.

(c) The repatriates from Algeria to France, due to Algeria's independence from France, increased France's labor force by 2%, but Hunt (1992) finds no significant impact on the French labor markets.

(d) Immigration from the former Soviet Union increased Israeli's population by 25% between 1950 and 1951 and the wages of high-skill natives.