v.149 - Legacy of Nine Update Notes

for the quest [Zombie Survival] The Final Day

what does this line mean "You may only choose one reward."

does this mean



- Pass the Regular Check-ups with a consecutive normal record of 30 times: Neville, the Legend (M) (Untradeable) and Neville's Heart (All Stat +5, MaxHP +100, 9 upgrade slots, Trade disabled when equipped).
- Become a Zombie 30 times without curing the virus: Clobber (M) (Untradeable) and Clobber's Heart (All Stat +5, MaxHP +100, 9 upgrade slots, Trade disabled when equipped).
- Cure the virus with vaccines 100 times: Disease Control STAR (F) (Untradeable) and STAR's Heart (All Stat +5, MaxHP +100, 9 upgrade slots, Trade disabled when equipped).

one of those or between the two eg for curing a virus 100 times Disease Control STAR (F) (Untradeable) OR STAR's Heart ?

I'm pretty sure it means that depending on what you do during the event, the end reward is different, and that you get both the Android AND the Heart.

Just think of it as 3 different rewards:
The Neville Droid
The Clobber Droid
The STAR Droid

It simply means you pick one of those depending on your actions.