问下~~

The first detailed study of magpie attacks in Australia indicates that by the time they had reached adulthood, 98 percent of men and 75 percent of women born in the country have been attacked by the birds

A. by the time they had reached adulthood, 98 percent of men and 75 percent of women born in the country have been attacked by the birds

B. by the time they reach adulthood, 98 percent of men and 75 percent of women, who were born in the country, had been attacked by the birds

C. by the time they reached adulthood, 98 percent of men and 75 percent of women born in the country had been attacked by the birds

D. 98 percent of men and 75 percent of women that were born in the country were attacked by the birds by the time they reach adulthood

E. 98 percent of men and 75 percent of women who were born in the country, by the time they reached adulthood had been attacked by the birds

C

不是说they一般不能在主语前指代主语吗？像c的话by the time they.....这里主语还没出来，能直接先用they吗？they 不是应该指代前面出现过的名词吗？