Which of the following could be added to support the idea that Doyle was an international success?
A.
In 1902, Doyle was knighted for his service during the South African War.
B.
In the fall of 1929, Doyle traveled to Holland, Denmark, Sweden, and Norway.
C.
In 1889, American audiences were more familiar with Doyle's writings than British audiences.
D.
In 1890, Lippincott's Monthly Magazine published Doyle's novel The Sign of Four in the U.S. and in England.