D. the photographs had been taken by a friend of my grandfather's.
It is in the passive voice because the subject "photographs" is receiving the action which is "taken"
Puerto Rico and Guam were ceded to the United States, the Philippines were bought for $20 million, and Cuba became a U.S. protectorate.
The word David is a <u>noun</u>.
Therefore, the answer is D
The correct answer is B. It illustrates the point that over time, people are less and less affected by death. This is 100% correct; I took the test. Hope I helped!