A Scientist Wants to Capture and Analyse Some of the Water

A scientist wants to capture and analyse some of the water that is being lost by transpiration via evaporation. She wants to capture the most amount of water in the quickest time from an actively transpiring plant in the sun. Which organs should she use to capture this water, and why?

A) Mature leaves, as these have the highest rates of transpiration.
B) Juvenile leaves, as these have the highest rates of transpiration.
C) The bottom most leaves, as these will have the highest amount of exudates due to guttation.
D) The green sections of the stem, as this has the lowest surface area to volume ratio.
E) Flag leaf one and two, as these are most rapidly expanding leaves.