Which of the following religions spread from Northern Africa to Sudan, Ethiopia, and other regions further south?

1. Islam

2. Animism

3. Hinduism

4. Christianity

Give an example of a situation in which an individual's pursuit of economic self-interest may not benefit but instead harm the rest of society

Which two words in this excerpt from the count of monte cristo can be used as synonyms to determine the meaning of the word grotto? dantès entered the second grotto. the second grotto was lower and more gloomy than the first; the air that could only enter by the newly formed opening had the mephitic smell dantès was surprised not to find in the outer cavern. he waited in order to allow pure air to displace the foul atmosphere, and then went on.

Are people more motivated to change from positive or negative experiences, like slavery, womens rights, and any other historical movements/moments? i need more factual information than opinions.