Diseases, such as yellow fever, were the number one cause of death and the actual enemies during the Spanish-American War. The war claimed the lives of nearly 3,000 American soldiers, but only a small amount actually died in combat. Meaning, the diseases were what actually killed most soldiers. So you answer is C, diseases such as yellow fever.
A the right do not incriminate onseld
That would be Indonesia. It is considered as the world's largest archipelago with roughly 17,000 islands which span more than 5,000 km (an estimated 3,200 miles). There are 8 major islands or island groups which are: Sumatra, Java, Borneo, Celebes, and Irian Jaya (western half of Papua New Guinea). The smaller islands are divided into 2 main groups: the Mollucas to the northeast, and the lesser Sunda chain east of Bali. Bali would be the 8th since it is considered as a unique island.