The Intersection of Two Sets Question 3

I am struggling to understand the answer to 'Which of the following showcases the two sets, whose intersection is the smaller set?'  the answer is 'black cards and clubs' but as I understand it for each:

• subset of clubs intersects completely with set of black cards (26 black with 13 clubs)
• subset of jacks intersects by a thirteenth with set of Aces ( 13 jacks, 1 Ace)
• subset of queens intersects completely with set of spades (1 queen, 13 spades)
• subset of hearts does not intersect with diamonds, they cannot happen simultaneously.

we are looking for the smallest overlap, therefore if the aforementioned theory was corrrect, answer 4 would be correct, no overlap or intersection? but instead it states answer 1 is correct? Can someone elaborate or explain more for me please?   Thanks