单选题:Which of the following questions does the text answer?

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题目内容:
Which of the following questions does the text answer? A.Why did most Victorians look stem in photographs?
A.Why did most Victorians look stern in photographs?
A.Why did most Victorians look stern in photographs?
B.WhY did the Victorians start to view photographs?
B.When did the Victorians start to view photographs differently?
B.When did the Victorians start to view photographs differently?
C.What made photography develop in the Victorian period?
C.What made photography develop slowly in the Victorian period?
C.What made photography develop slowly in the Victorian period?
D.How did smiling in photographs become a post-Victorian norm?
D.How did smiling in photographs become a post-Victorian norm?
D.How did smiling in photographs become a post-Victorian norm?
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