"Big Money Shouldn't Buy Our Elections" articulates a clear claim for its argument, whereas "Corporations Have Campaign Rights, Too" does not. Hence the correct option is b.
The key distinction lies in the clarity of the central claim within each statement. "Big Money Shouldn't Buy Our Elections" is noted for articulating a clear stance against the influence of significant financial contributions in electoral processes. This statement implies a straightforward position against the impact of large sums of money on elections.
On the other hand, "Corporations Have Campaign Rights, Too" lacks a similarly explicit and direct assertion, making its central claim less apparent. Without a clearly defined stance, it may suggest a more nuanced or balanced perspective, possibly acknowledging the rights of corporations without explicitly opposing or supporting their involvement in campaigns. This contrast underscores the importance of a well-defined and explicit central claim in effectively conveying the position of an argument. Hence the correct option is b.