The correct answer to this open question is the following.
Although the question does not provide any options, we can say the following.
The United States sent a representative to the Berlin Conference (1884-1885) but that the representative refused to be a signatory to the final agreement because there had been some changes in the domestic politics of the United States. What the US was interested in was in maintaining its politics and economic interests in the region. So the US generally supported the agreements and the partition of the African continent.
During the Berlin Conference of 1884-1885, European superpowers divided the African territories to fulfill their interests. In what was commonly know the "Scramble for Africa," Great Britain, France, Italy, Spain, Portugal, Germany, and Belgium split African lands to colonize them and exploit their raw materials and natural resources.