With lessons 5 and 6 I don’t understand thanks it’s due today

(i think my answer is a, am i correct? ) a pentagonal traffic sign is a sign. a. school crossing b. parking c. wrong way d. yield

In a paragraph of no less than 125 words, explain the single most important factor involved in advancing american classical music in the twentieth century.

This brooch contains a miniature picture of american statesman henry clay. likely owned by clay or his ancestors, this brooch is valued for what reason? a. scholastic value b. provenance c. cultural heritage d. market value pls hurry and you