A scientist question should be A. vague
B. non-repeating
C. creative
D. non-testable

Creative

Explanation:

A scientific question is a scientific inquiry which is framed on the basis of observation and limited evidences obtained from the natural processes. A particular scientific question should be testable, repeated so as to determine the accurate and reliable answer obtained after experimental procedures.

It should be creative means it should be original, unique and must frame the curiosity of the scientist.

halogen, any of the six nonmetallic elements that constitute group 17 (group viia) of the periodic table. the halogen elements are fluorine (f), chlorine (cl), bromine (br), iodine (i), astatine (at), and tennessine (ts).

the answer to your question is b