21.1. According to the passage, which of the following istrue of the rock fragments contained in the sediments studied by Bond?
A. The majority of them are composed of red sandstone.
B. They must have reached their present location over 1,500 years ago.
C. They were carried byicebergs to their present location.
D. Most of them were carried to their present location during a warm period inEarth’s climatic history.
E. They are unlikely to have been carried to their present location during theLittle Ice Age.
21.2. In the final paragraph of the passage (lines 27-33),the author is concerned primarily with
A. answering a question about Earth’s climatic history
B. pointing out a potential flaw in Bond’s hypothesis
C. suggesting a new focus for the study of ocean sediments
D. tracing the general history of Earth’s climate
E. discussing possibleimplications of Bond’s hypothesis
