I’d have to say C or D but I’d mainly go for C cause it’s pretty logical
First one for sure
im guessing third one too
plz wait for another person to answer the rest but im pretty sure its only those two
hope this helps
Cyanobacteria, also known as "blue-green algae", are the unicellular organisms which are able to produce oxygen.
Approximately 540 years ago, the atmosphere was very poor on oxygen. Cyanobacteria are thought to be responsible for the oxidization of the atmosphere back then, in an event known as <em>"The Great Oxygenation Event"</em>. As a result, Earth's life forms suffered drastic changes in their composition, as they evolved from being <em>anaerobic</em> to becoming organisms <em>highly dependant</em> on oxygen. The oxygenation of the atmosphere would eventually provide the adequate environment in order for the <em>Cambrian Explosion</em>, or the first diversification of living organisms, to happen.
“The following statement about the disenfranchisement of African Americans in the South which is true is that white voting officials administered difficult literacy tests to African American voters. Since African Americans were denied the same standard of education as American Whites, when offered literacy tests they often had trouble completing them. The voting officials were aware of this, but did it anyways, as it was another way for them to hinder African Americans from voting and from entering the larger society.”