Which role best describes the president’s duties as head of the executive branch of government? chief of state chief of party chief administrator commander in chief

The correct answer is "Chief of State".

As a Chief of State, the President is in charge of all of the government workers that form part of the Executive Branch. It is up to him to decide what is the best way to enforce the Law provided by the Legislative Branch. In order to take the most informed decisions, it is a common practice for President's to hire advisors who are specialists regarding certain matters in public policy.  

the effect of the ming leaders banning ships with more than two masts was that there was no further construction of ships masts, because there was a surplus. ming emperors disallowed foreign exploration