Can someone crop the brainlist icon, and post it as a question, when you've done it answer done

The dynamics of a musical piece refer to the a. key signature b. composer’s history c. volume changes d. instrumentation

(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

Is this statement true or false? artists like maya lin make memorials to preserve and honor the memory of important people and events.