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A doubtful mcq about bio!

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24 What is transpiration and which advantage does it give to the plant?
transpiration advantage to the plant
A]evaporation of water
from leaf surfaces
Advantage:
maintains the
water potential
B] evaporation of water
from leaf surfaces
Advantage:
stomata are open
for gas exchange
C] loss of water vapour
from leaves
Advantage:
maintains the
water potential
D] loss of water vapour
from leaves
Advantage:
stomata are open
for gas exchange.

the answer is D in the marking scheme but it can also be C,can't it?
 
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the questions asks what is advantageous for plants.....mantaining water potential is not actually important to plants comparative to gaseous exchange which is necessary for PHOTOSYNtHESIS to proceed
 
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