Help help help please?!?!? which verb or verb phrase signals an inappropriate shift in moods ?

1. Must attend

2.Will you let

3.Will be served

4.Should first change ​

To celebrate black history month, we will be learning about the lives of some african americans. your assignment is to find biographical (life story) information about one famous african american historical figure. be sure that you find the following information about the person you select: date of birth, country of origin, how he or she (or his/her family) came to the united states, why he/she is famous, and how the person died (if applicable). we will use the information that you gather in the research on an in-class project. be sure to keep track of your sources; your final project will require a works cited page. in an internet search engine, which group of keywords is most appropriate for this assignment? a) black history month, date of birth b) african, american, people, biographies c) famous people, africa, america, project d) african american, people, countries, famous