the one that is most probable is the one that is most likely to happen, ie the one that is closes to having a 100% chance of happening
100%=1 so the number closes to 1 is the most likely
we can't have a probility of more than 1 so we can say that the greatest number is most likely
if we rank the numbers we get
0.9>0.5>0.35>0.00100
so the answer is B. 0.9 which is equivilent to an 90% chance of the event occuring