unless you are luckier than most,hundreds of other people will also have discovered your natural paradise.

a)replace you with one
b)change than to then
c)change discovered to been discovered
d)no correction neccesary

We'll be glad to check your answer.

i choose b

is that the correct answer?

Nope. The word "than" is correct in that sentence.

d no correction necessary

You've got it! No correction is necessary!

D ; no correction necessary

Unless you are luvkier than most hundreds of other people will also have discovered your naural paradise

The correct answer is b) change "than" to "then".

Explanation:
The phrase "unless you are luckier than most" implies a comparison between the person being addressed and most people. Therefore, the correct word to use in this context is "then" instead of "than". "Then" is used to indicate a subsequent time or sequence of events. Moreover, the rest of the sentence remains grammatically correct in this case. Therefore, the correction necessary is to change "than" to "then".