Which of the following is an example of an asset without donor restrictions?A promise by a donor to give $$10,000$ to construct a new office buildingA promise by a donor to give $$10,000$ for a new building when $$100,000$ has been raised fromother donorsCash contributed to the American Cancer Society to fund research to find a cure for cancerGift of land with the donor stipulation that it be set aside as a nature preserve in perpetuity