Which of these is a CLEAR improvement of his opening sentence? A) Learning martial arts is something that I believe everyone should do. B) People who take martial arts classes gain a lot of important knowledge. C) Martial arts classes will teach everyone important skills that they can use. D) Taking martial arts classes helps people gain important self-defense skills.

that would be D

Explanation:

i just took the usa test prep

imagine that you are the director of the anne frank house. write a -you letter to bernard elias for his gift to the museum. in the letter, explain why the gift is an important addition to the museum's collection. use ideas from the article, as well as your own ideas, to write your letter. type your answer in the text box below.(burn njigger) : )

not concrete, existing in thought or as an idea but not having a physical or concrete existence