Q:Read the following article and select the best answer. Article: Why do men die earlier than women? The latest research shows that the reason could be that men's hearts go into rapid decline when they reach middle age. The largest study of the effects of aging on the heart has found that women's longevity may be linked to the fact that their hearts do not lose their pumping power with age. "We have found that the power of the male heart falls by 20-25 percent between 18 and 70 years of age," "Within the heart there are millions of cells that enable it to beat. Between the ages of 20 and 70 , one-third of those cells die and are not replaced in men," . What surprises scientists is that the female heart sees very little loss of these cells. "This gender difference might just explain why women live longer than men," said Goldspink. The team has yet to find why aging takes a greater toll on the male heart, said Goldspink.. The good news is that men can improve the health of their heart with regular exercise. Question: According to the passage, the UK scientists have known that _ . - women have more cells than men when they are born - women can replace the cells that enable the heart to beat - the female heart loses few of the cells with age - the female heart never loses the pumping power with age
A:
the female heart loses few of the cells with age