A "spendthrift" is best defined as which of the following?

The term "spendthrift" refers to an individual who spends money extravagantly and often without regard for the consequences. This definition aligns with option C, emphasizing the notion of wasteful spending. A spendthrift typically disregards any need to save or budget, resulting in financial irresponsibility.

Understanding this word in context complements its meaning; consider how the suffix "-thrift" indicates saving, while "spend" directly opposes that notion. The juxtaposition highlights the characteristics of a spendthrift distinctly as someone who squanders funds rather than managing them prudently.