I think it’s the second option. There is a ph scale attached below to explain this. Hope it helps.
Answer:
Hypothesis. A Hypothesis is an estimation of what might happen and the student's observation before moving on to investigate.
Answer:
To keep blood safe, blood banks carefully screen donated blood. The risk of catching a virus from a blood transfusion is low. Sometimes it is possible to have a transfusion of your own blood. During surgery, you may need a blood transfusion because of blood loss.
hope this helps!!:)
Explanation:
B because I need to do this thing too I asked my teacher and she said it was b