Question

12 multiple choice 1 point in 1943, 15% of shipyard workers in san francisco were chinese - americans. before this, they had been largely constrained to working in restaurants and laundries. this switch in occupations was due, in large part, to the... shipbuilding skills of chinese - americans increased labor union restrictions vs chinese - american workers increased availability of higher education for immigrants massive need for workers to build ships during ww2

Explanation:

1943 falls during World War II, when the U.S. had an urgent, massive demand for shipbuilding to support the war effort. This labor shortage led employers to hire groups that had previously been limited to specific low-wage jobs, like Chinese-Americans, breaking their earlier occupational constraints. The other options do not fit: Chinese-Americans were not hired for pre-existing shipbuilding skills, union restrictions would have blocked rather than enabled the shift, and higher education access did not drive this occupational change.

Answer:

Massive need for workers to build ships during WW2