Which signal word signifies a problem or solution structure in a text?

• A. Next
• B. However
• C. The question is
• D. For example

Answer: (C)

The phrase "The question is" signals a problem or solution structure in a text because it directly indicates that a problem is being presented. This phrase typically precedes a discussion of the problem that needs to be addressed, along with potential solutions or considerations related to that issue. It invites the reader to focus on what the main concern is, setting the stage for explaining how it can be resolved.

In contrast, "Next" simply indicates a sequence or continuation of ideas without implying a problem or solution. "However" suggests a contrast or an exception but does not inherently present a problem. "For example" is used to provide illustrations or specific instances that clarify or elaborate on a point, but it does not denote a problem-solution dynamic.