The graph below shows three different normal distributions. Which statement must be true? Each distribution has the same mean and the same standard deviation. Each distribution has the same mean and a different standard deviation. Each distribution has a different mean and the same standard deviation. Each distribution has a different mean and a different standard deviation.

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The graph below shows three different normal distributions.

Which statement must be true?
Each distribution has the same mean and the same standard deviation.
Each distribution has the same mean and a different standard deviation.
Each distribution has a different mean and the same standard deviation.
Each distribution has a different mean and a different standard deviation.

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D.

Each distribution has a different mean and different standard deviation

Step by step explanation:

If they are in different positions on the number line, and assuming the distribution is normal, they will all have a different average. You also mentioned that the width is different, so they are all different from the average slightly different from each other.