Question

What was the basis of Lee Yick's appeal to the U.S. Supreme Court after his conviction for running an illegal laundry in San Francisco?
A.
At his trial, he had not been permitted to call witnesses to give testimony that could have proved his innocence.
B.
The requirement that laundries be housed in brick buildings was an unfair burden on Chinese immigrants.
C.
The local sheriff had arrested Chinese laundry owners but not white laundry owners who committed the same offense.
D.
Fire marshals had not inspected his laundry before declaring that he was operating in an unsafe manner.