1) successful entrepreneurs--m-->18 hours plus 2) 18 hours plus-->no leisure 3) happy entrepreneurs-->leisure (no leisure-->not happy entrepreneur)
There are a number of conclusions that we can make from the premises. If we combine the first and second statements, we know that most successful entrepreneurs have no leisure time. Additionally, combining statement 2 with the contrapositive of statement 3, we see that anyone who works 18 plus hours per day is not a happy entrepreneur. Lastly, combining all three statements, we know that most successful entrepreneurs are not happy entrepreneurs.
This is a bizarro (except) question, so we're looking for the one answer that cannot be true (must be false).
(D) says, "Some entrepreneurs who work at least 18 hours a day are happy."
The second thing we mentioned we could figure out is that anyone who works at least 18 hours per day is not happy, so there is absolutely no way that (D) can be true, so it's the correct answer choice.
Does this make sense? Let us know if you have any other questions!