a. The only possibility for the show to be cancelled is if it rains.
b. The only way for the show to be cancelled is if it rains.
c. The only way it is possible for the show to be cancelled is if it rains.
d. The only possibility for the show to be cancelled is that it rains.
e. The only way for the show to be cancelled is that it rains.
f. The only way it is possible for the show to be cancelled is that it rains.
Which of the above are grammatically correct and meaningful?