thanks Testluv for the inputs.....
here is something that I have to say....
say previously the total no. of visitors was 50.
the total no. of visits was more than 100.
here the total no. of "more than once " visitors was say 20
Now the total no. of visits increased to 120.
as per option A , the total no. of "more than once " visitors must increase to more than 40, say 45.
Now considering that the "more than once " visitors accounts for 2 visits each, the total increase visits has to increase by atleast 50.
but as we see, the total no. of visits has increased by 20 only.
is not this contradicting?
now, the only way we can make this happen is by assuming that the no. of "one time visitors" is actually decreasing and so the conclusion.
I might be dropping a bomb here by mentioning some baseless logic

but this is the way looked at it.
Will someone pl. help?