According to the study, if the first child of the

单项选择题

Researchers may have found a solution to the annoying gender-wage gap: Tell all the male CEOs to have more babies. And only child daughters, to be precise.
A new, not-yet-published study that tracked 12 years of wage data in Denmark finds that when male CEOs had daughters, their female employees’ wages went up 1.3 percent while their male employees only gained 0.8 percent raises. The study’s authors--from Aalborg University in Denmark, the University of Maryland, and Columbia—found that women’s wages were boosted even more if the daughter was the first child Of the CEO. The researchers found that the birth of a first daughter to a male CEO "resulted in a 1.4 percent increase in women’s wages, and an approximately 0.8 percent decrease in the gender wage gap. If the first daughter was also a first child, the gender wage gap decreased by roughly 2.8 percent." If a second daughter was born to a male CEO, women’s wages were not significantly affected. "Thus, our results suggest that the first daughter ’flips a switch’ in the mind of a male CEO, causing him to attend more to equality in gender-related wage policies," they write.
David Gaddis Ross, co-author of the study and an assistant professor at Columbia’s Business School, said he would love to do a similar study in the United States, but there is no way the data would be available. "Getting this information in the United States would be wildly difficult, especially on the family structure of the CEOs," he said. The Denmark data did not reveal names of individuals or companies, but each employee of every company in the country is attached to a code that researchers could use to find gender, number of children, salary, and other information such as home address and phone number.
The study is not the first to examine how having a daughter affects men’s decision-making. Ebonya Washington wrote in a study published in the American Economic Review in 2008 that U.S. legislators were more likely to vote more liberally on women’s reproductive issues if they had daughters. Another study found that parents with daughters were more likely to adopt feminist views on gender equality.

According to the study, if the first child of the CEO was a daughter, the decrease of the gender wage gap was ______.

A. 0.8%
B. 1.3%
C. 1.4%
D. 2.8%