Choice D is the best answer. This question tests dash usage before a summary.

1. Context clues: A list is followed by a summary referring back to those items.
2. Meaning: A dash can introduce a summary after a series.
3. Verify: "Dedication, creativity, and resilience—these qualities enabled..." effectively summarizes.

💡 Strategy: Use a dash before a summary that refers back to a preceding list.

Choice A is incorrect because colons introduce what follows, not summarize what precedes. Choice B is incorrect because a comma doesn't provide sufficient separation. Choice C is incorrect because semicolons aren't for summaries.