for the triggers to hold the United States to its commitments, the threshold ultimately provided the United States a de facto veto power over replenishment and capital increase negotiations due to its ability to bring replenishment negotiations to an impasse by threatening to withhold support. The U.S. has used this influence to further its long-term foreign policy objectives and short-term political and economic goals by imposing conditionality on replenishment negotiations. Lending The IDA lends to countries with the aim to finance projects that will develop infrastructure and improve education, healthcare, access to clean water and sanitation facilities, and environmental responsibility. It is considered to be the soft lending window of the World Bank, while the IBRD is considered to be the hard lending window. The association offers grants and loans with maturities ranging from 25 to 40 years, grace periods of 5 to 10 years, and interest rates of 2.8% or 1.25% depending on whether the borrower is a blend country and to which degree it is eligible. Regular IDA-eligible borrowers may take advantage of no-interest loans. Financial resources are allocated to eligible countries based on their success at implementing pro-growth and a poverty-reducing domestic policies. The IDA uses the World Bank's Country Policy and Institutional Assessment (CPIA) development indicator to determine each country's place in a resource allocation index. It then prioritizes its lending to those countries which are indicated to be most promising in terms of favorable policies and aid effectiveness. The IDA adopted the Crisis Response Window in 2007 to enable the rapid provision of emergency financing in response to crises. The association adopted the Immediate Response Mechanism in 2011 to provide IDA borrowers with immediate access to withdraw undisbursed portions of their loans, should a crisis arise that meets the mechanism's criteria. The replenishment rounds are typically agreed every three years . The eighteenth was finalised in December 2016, the nineteenth was being discussed in October 2019. Africa Because African countries face some of the most severe poverty and underdevelopment, and because 39 of those countries are the IDA's poorest member states, the association allocates approximately half of the IDA's resources toward financing projects in those countries. As a result of its efforts to improve the region, the IDA has helped bring electricity to an additional 66 million Africans since 1997, helped build or restore 240,000 kilometers of paved roads, and helped enroll an additional 15