I've got a pack of Wyeast Activator liquid yeast with a date of 9/13/10 in the back of my fridge. It has puffed up a bit, but not as big as they usually do when you smack them. I was planning on using it for a brew day on Saturday, but the Mr. Malty calculator says that its only 10% viable. My planned brew is going to have an OG of 1070.
A. Throw it out and buy new yeast.
B. Make my starter as planned, try the old yeast, and hope for the best.
C. Make a starter with new yeast, and double pitch the starter and the old yeast.
D. None of the above.