Ascientific question should be

a. vague
b. creative
c. non-testable
d. non-repeating

B. 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.

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).