It is c because it will have a more positive connotation.
Answer:
C
Explanation:
The citation for C has the authors name and the title of the book.
The best way to describe the sentence " In 1984, Byron Lichtenberg, who is a biomedical engineer became a member of a spacecraft crew." is complex. The correct answer is C, complex.
They might have gathered data through structures for viewing sky events. They might have had a cultural importance.
