(A) The office is led by the chief of staff, who serves as a key adviser to the president.
Answer:hola
Explanation: la versed no se
Earth's atmosphere is 78% nitrogen, 21% oxygen, the rest 1 percent with very small percentages of other elements like Co2.
The Liberals were defeated is the answer to this.
Answer:
A is the answer because it says "the winner of the essay contest by "awarding" her a certificate
