Which describes a non-uniform probability model?

Responses
A selecting a single card from a deck of cardsselecting a single card from a deck of cards
B selecting a ball from 2 purple balls and 2 green ballsselecting a ball from 2 purple balls and 2 green balls
C the chance of an odd or even number from rolling a diethe chance of an odd or even number from rolling a die
D selecting a day of the week using only the first letter of that day

D selecting a day of the week using only the first letter of that day