To answer this question, we need to analyze the given statements and determine if the third statement is true, false, uncertain, or none of the above.

Let's go through each statement:

1. All the trees in the park are flowering trees. This statement means that every tree in the park is a flowering tree. It indicates that there are no trees in the park that are not flowering trees.

2. Some of the trees in the park are dogwoods. This statement means that there are at least a few trees in the park that are dogwoods. However, it does not provide information about whether all dogwoods are present in the park or if there are any dogwoods that are not in the park.

3. All dogwoods in the park are flowering trees. This statement implies that every dogwood in the park is a flowering tree. It further suggests that there are no dogwoods in the park that are not flowering trees.

Based on the first two statements, we can conclude that all the trees in the park are flowering trees, and some of them are dogwoods. Since all dogwoods in the park are flowering trees, it is logical to conclude that the third statement is true.

Therefore, the correct answer is A) true.

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