In a study of the impact of eating fruit on birth weight, researchers analyze birth weights (in grams) for babies born to 189 women who gave birth in 2018 at a hospital in California. Suppose in the group, 74 of the women were categorized as "fruit eaters" and 115 as "non-fruit eaters." The difference in the two sample mean birth weights (fruit eaters minus non-fruit eaters) is 21.7 grams and the 95% confidence interval is (-18.5, 18.5)

Which gives the best interpretation of what we can conclude about the impact of eating fruit on birth weight?

This study does not suggest that there is a difference in mean birth weights when we compare fruit eaters to non-fruit eaters.

There is a 95% chance that if a woman eats fruit during pregnancy her baby will weigh between 76.5 grams to 486.9 grams more than if she did not eat fruit.

We are 95% confident that on average, eating fruit causes higher birth weights of between 76.5 grams to 486.9 grams.

Eating fruit is associated with higher birth weights. When fruit eaters are compared to non-fruit eaters, we are 95% confident that the mean weight of babies of fruit eaters is between 18.5 grams less to 18.5 grams more than the mean weight of babies of non-fruit eaters.