50 POINTS AND BRAINLIEST IF YOU GIVE AN EXPLANATION!!

A standard deck of has 52 cards, and contains 13 cards of each of the four suits: diamonds, spades, hearts, and clubs. What is the probability that you choose a spade, given that you have already chosen a diamond (and have not replaced it)?
A) 3/13
B) 4/17
C) 1/4
D) 13/51