Personally, meaning YOU.
Could be, eat, touch, see, hear, feel.
Cardiorespiratory fitness refers to the ability of the circulatory and respiratory systems to supply oxygen to skeletal muscles during sustained physical activity.
A thing or event that evokes a specific functional reaction in an organ or tissue.
Answer:
I think it is probably (C) for the first one because some take a higher dose to get a stronger effect. At least from my experience :/
And for 9 I would say taking two little (D) because that should not pose a harm for a under-dose
Hope this helps
Explanation: