The population of a bacteria colony doubles every day. If it was started 9 days ago with 2 bacteria and each bacteria lives for 13 days, how large is the colony today?  Options:  A) 512  B) 1024  C) 768  D) 2048  E) 4096

Rationale: "9 days ago - 2 8 days ago - 4 7 days ago - 8 6 days ago - 16 5 days ago - 32 4 days ago - 64 3 days ago - 128 2 days ago - 256 yesterday - 512 today - 1024 ans : b"
Answer: B