North America contains the largest number of oak species, with approximately 90 occurring in the United States, while Mexico has 160 species of which 109 are endemic. The second greatest center of oak diversity is China, which contains approximately 100 species.
Explanation:
Hope this helps. If it doesn't I don't know what to say.
A. Interrogative, question mark. "Have you ever been to North Carolina?" is a question, hence the question mark. If one is being interrogated, he or she is being questioned.
