Which pair of age ranges corresponds to the two studies of concert ticket pricing?

• A. 18-60 and 18-31
• B. 18-60 and 25-40
• C. 21-30 and 18-31
• D. 18-60 and 18-31

Answer: (D)

The question is asking you to identify two age ranges that plausibly describe the participant groups for two separate studies of concert ticket pricing. The best pairing is one study that includes a broad adult range (18 through 60) and another study that focuses on a narrower young-adult range (18 through 31). This makes sense because both studies start at 18, covering adults, but one spans a wide span up to 60 while the other narrows to 31, allowing a clear, comparable contrast between a broad audience and a younger subset.

Other pairings mix ranges that don’t align as cleanly for two distinct studies of the same topic. For example, ranges that start at higher minimum ages exclude younger adults, which disrupts the idea of comparing pricing across multiple adult groups, or they don’t share a common lower bound in a way that keeps the two studies clearly comparable. The 18-60 and 18-31 pairing fits the setup of two related studies described by two age ranges.