Source :
GMATPrep Default Exam PackThe 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 birds
(C) by the time they reached adulthood, 98 percent of men and 75 percent of the 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 birds
https://www.newscientist.com/article/mg15120450-800-wronged-magpies-fight-back/AUSTRALIAN wildlife can be a real health hazard—and it’s not just spiders and snakes that are the problem. The first detailed study into magpie attacks has found that a staggering
98 per cent of men and 75 per cent of women born in the country are likely to have been attacked by the birds by the time they reach adulthood.
look at choice D.
by the time +present simple must go with 'will have done" , not with 'did'. so D is gone
close
