Final answer:
Operation Star of David (option c) was the codename for the Vel' d'Hiv roundup during World War II, where a mass arrest of Jews was conducted by the French police.
Step-by-step explanation:
The codename for the Vel' d'Hiv roundup was Operation Star of David (option c). This event in history refers to the French police's mass arrest of Jews in Paris during World War II, which took place on July 16 and 17 in 1942. The Vel' d'Hiv is short for Vélodrome d'Hiver, or Winter Velodrome, an indoor cycling track where many of the arrested Jews were temporarily confined.
Comparing this historical event to the atomic bomb, which had the codename Little Boy and was loaded onto the B-29 bomber Enola Gay for its mission against Hiroshima, helps illustrate the use of codenames in military and paramilitary operations.