I believe the correct answer would be C. A presidential appointment is confirmed by the Senate. This can be seen under the Appointments Clause of the United States Constitution where it says the certain federal positions that are appointed by the president of the US should be confirmed by the US Senate.
The Portuguese, the Dutch, the English is the chronological order of European countries that controls the African slave trade. Slaves were used in mining and plantations. Five times as many Africans arrived in the Americas than in Europeans, as the result of this slave trade.