Ben Franklin had previously experimented

Ben Franklin had previously experimented with cooking live turkeys with electricity, but his first formal experiment in front of Christmas dinner guests did not go like he planned: instead of killing the turkey he delivered a severe shock to himself, which caused his whole body to go numb for the evening.

A) Ben Franklin had previously experimented with cooking live turkeys with electricity, but his first formal experiment in front of Christmas dinner guests did not go like he planned

B) Ben Franklin previously experimented with cooking live turkeys with electricity, but his first formal experiment in front of Christmas dinner guests did not go like he had planned

C) Ben Franklin, after previously experimenting with cooking live turkeys with electricity, his first formal experiment in front of Christmas dinner guests did not go as he had planned

D) Ben Franklin had previously experimented with cooking live turkeys with electricity, but his first formal experiment in front of Christmas dinner guests did not go as he planned

E) Although he had previously experimented with cooking live turkeys with electricity, Ben Franklin's first formal experiment in front of Christmas dinner guests did not go like he planned