for the closest C with minimal changes you need to change смотрел to посмотрел
for the A you need to change it like in C and add затем or потом before попил
B would be Я пил чай когда смотрел телевизор
BTW your initial sentence consists of two independent actions which cannot be described on the timeline by either of options, however you cannot say that it doesn't make sense at all
It's more like list of actions
I was watching TV, I also has drunk tea
Eizokusei wa mukuwa reru