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A
The Chief Justice
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B
The Speaker of the House
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C
The President
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D
The Senate Majority Leader
Why this is the answer
The PRESIDENT is in charge of the EXECUTIVE BRANCH. The executive branch carries out and enforces federal laws. It includes the President, Vice President, the Cabinet, and federal agencies and departments. USCIS Civics Question: 'Who is in charge of the executive branch?' — Answer: the President. THE THREE BRANCHES: Legislative (Congress — makes laws); Executive (President — enforces laws); Judicial (courts — interprets laws). The President is both the head of state and head of government, as well as commander-in-chief of the military.
Source: USCIS Civics — Executive Branch