Pattern transitions are words and phrases that help organize a text and make it easier for the reader to follow an argument and help keep the focus on a particular idea. For example, writers may refer back to the thesis statement or main idea throughout the essay. Which of the following is a pattern transition in paragraph 12 of the passage?

5. the following question refers to the four selections by albert einstein: these readings show that, between 1939 and 1952, einstein a) abandoned science and turned to political activism. b) revised his opinions about the need for nuclear weapons. c) worked tirelessly to abolish nuclear weapons. d) devoted himself solely to scientific research.