No, the distance from the last stop..... or c
The most common reason for the condensation on the inside of the roof is the evapotranspiration from the leaves of the plants in the conservatory.
The correct answer is A....
Carbon dioxide is a byproduct of respiration while oxygen is a byproduct of photosynthesis.
Remember that a byproduct is a secondary product that is made in the synthesis of another. It is unintended and excreted.