A scientist wants to learn more about a set of stars in the night sky. What should he or she do to learn if it's a pattern or not? A. Read a magazine on stars
B. Research stars on a computer
C. Make observations of the stars for one night
D. Make observations of the stars every night for two weeks

B or D

Explanation:

they are both good choices.. sorry I didn't know the definite answer

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

i think? ?