Question of the Day 
 
UK researchers have found that a diet low in calcium can lead to an early onset of osteoporosis in women. Which is why, men can get osteoporosis and should watch the level of calcium in their food.

The author's conclusion about men is based on the assumption that:
OPTIONS
 
 1)Low calcium may cause osteoporosis in men.
 2)Osteoporosis affects many people.
 3)Osteoporosis is caused by low calcium which is common among women.
 4)Since low calcium causes osteoporosis in women, it will have a similar effect on men too.
 5)Osteoposoris is a direct effect of low calcium.