Choose the letter of the sentence that best expresses the im…

Choose the letter of the sentence that best expresses the implied main idea of the following paragraph. A round foundation in Africa that is two million years old reveals an appreciation like our own for balance and form.  A flower arrangement found in an ancient burial site in Iraq suggests that flowers were a symbol of comfort.  Ice Age sculptures emphasize human sexuality, showing the importance of fertility to early people.  And cave paintings dating back to 20, 000 B.C. prove that the artists were keen observers of nature.