Answer:
The given statements are not effective hypotheses
Explanation:
Given that,
Your little sister asks you a scientific question:
"Does chocolate milk come from  brown cows?"
We know that,
The chocolate milk does not come from  brown cows.
We need to find the given statement is effective hypotheses
According to given statement,
The following statements are not effective hypotheses because all cows give the white milk.
So, we can say that, we mix the chocolate powder in the milk then we get the chocolate milk.
Hence, The given statements are not effective hypotheses
