A single card is drawn from a well-shuffled standard deck of 52 cards. For which of the following pairs of events does P(E∪F)=P(E)+P(F) hold?
a) E: “the card is a king”, F: “the card is a face card”
b) E: “the card is a heart”, F: “the card is a king”
c) E: “the card is a heart”, F: “the card is a diamond”
d) E: “the card is a face card”, F: “the card is red”