Read the passage below. Chen was very hungry and could not wait to eat her lunch. Although she knew it was no guarantee against getting sick, Chen decided to wash her hands first because she knew it was one of the easiest ways to prevent the spread of germs.

What sequence signal word appears within the sentences?

although
first
and
because

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.