Final answer:
The strongest claim for a presentation on the lack of clean drinking water globally is statistical data, which provides specific, measurable evidence of the issue's seriousness and impact on public health.
Step-by-step explanation:
The strongest claim for a presentation about the global problem of a lack of clean drinking water would be c) Statistical data. This type of evidence provides concrete, quantifiable information that can effectively illustrate the magnitude of the issue. For instance, statistical data from the World Health Organization highlights that approximately 880 million people did not have access to safe drinking water in 2008, which reinforces the urgency of the situation. Moreover, nearly 1.7 million people die annually from diseases related to unsafe drinking water, inadequate sanitation, and poor hygiene, with a significant percentage of these deaths being children under 5 years of age. These statistics underline the gravity of the water crisis and its impact on public health, making them powerful supporting details for the presentation.