Why have historians only recently solved some of the secrets of early african civilizations?
select the best answer from the choices provided.
a.
some societies did not leave written records.
b.
many historians had been biased against african civilizations.
c.
some writing systems were figured out only in the last 150 years.
d.
all answers are correct.

On the map above, areas along the coast are colored green (letter b). what type of climate do these areas have? a. arid b. semiarid c. mediterranean d. humid subtropical

Read this passage: the president has asked congress to consider a new antiterrorism law. the law would give law enforcement agencies more freedom to monitor suspected terrorists' phone calls, text messages, and internet usage. the law's supporters claim that it is an essential tool to keep americans safe from terrorism. its opponents claim that it infringes on their civil liberties by stripping them of the right to privacy. which action would the party opposing the president most likely take to resolve this issue? a. encourage its members to publicly attack the law to sway public opinion against it b. begin a campaign to have the president removed from office because of his proposal c. take the matter to federal court to prevent the party from having to support it d. demand that public safety issues be left to the states rather than the federal government (apex)

In the supply-and-demand schedule shown above, the equilibrium price for cell phones is $25 $100 $200