Final answer:
There are four nines in a standard deck of 52 cards, one from each of the four suits: clubs, diamonds, hearts, and spades.
Step-by-step explanation:
In a standard deck of 52 cards, there are four suits: clubs, diamonds, hearts, and spades. Each suit has 13 cards which are A (ace), 2, 3, 4, 5, 6, 7, 8, 9, 10, J (jack), Q (queen), K (king). Therefore, in a standard deck, there are four nines, one from each suit.
The correct answer to the question 'How many nines are in a standard deck of cards?' is A) 4.