Which of the Following Would Be a Good Example of a Hypothesis

Which of the following would be a good example of a hypothesis in the scientific method process? Paired item 2)

A) a botanist adds 20 mL of water to his plants on a daily basis and he notices a healthy growth, therefore, he believes that adding 40 mL of water on a daily basis will enhance their growth further
B) a botanist adds 20 mL of water to his plants on a daily basis and he notices a healthy growth
C) a botanist adds 20 mL of water to his plants on a daily basis and he notices a healthy growth, therefore, adding 40 mL of water on a daily basis will definitely enhance their growth further