Which three factors limit descriptive and comparative investigations? A. The way you must write hypotheses
B. The number of observations you can make
C. The amount of time or money required
D. The features of objects that you cannot see
E. The number of variables you can have

the answer is neither ball has a charge.

because if they were both positively charged, they will repel each other.

if they were positively and negatively charged, they will seek.

scientific laws are the result of testing theories and proving them to be facts.

c. magnitude and direction