I think the answer is b sorry if i'm wrong
Answer:
Abu Bakr was an adviser and companion of the Prophet Muhammad. Abu Abu Bakr controlled the administration and later selected as caliph (ruler of the Islam community) after Muhammad's death. As a caliph, Abu Bakr launched many military campaigns to bring Arabia under Islam and was successful in expanding Islam further through conquering.
Theodore Roosevelt asserted American power with the Monroe Doctrine.
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Answer: household and firms
Explanation:
The circular flow model which is also referred to as the circular flow of income simply shows how money flows or changes hand between the household and the firms.
For example, the individuals purchases goods from the firm's and the firms pay individuals which are the workers wages and salaries. Money moves through different ways in the economy.