What clothing style became popular in the 1940s as a result of utility fashion?

The bikini is the correct choice as it became popular in the 1940s, particularly after its debut in 1946. The concept of utility fashion during World War II influenced many clothing styles due to fabric rationing and the need for practical clothing. As wartime restrictions lessened, designers began to experiment with new styles that were impactful and symbolized post-war freedom. The bikini represented a shift toward more daring swimwear, challenging traditional norms of modesty.

In contrast, hippie style emerged in the 1960s, power suits made their mark in the 1980s, and bohemian style reflects a different aesthetic that is more associated with the 1960s and 70s. Understanding these timelines and influences helps clarify why the bikini is linked to the post-war era rather than the other options.