In the context of medicinal botany, what is a common cause of chlorophyll discoloration in plants, and how might it relate to their medicinal properties?
a) Excessive sunlight exposure leading to photosynthesis inhibition, potentially affecting the plant's medicinal efficacy.
b) High soil pH causing increased chlorophyll synthesis and enhancing medicinal properties.
c) Nutrient deficiency in the soil resulting in chlorophyll discoloration and potentially reducing the plant's medicinal value.
d) Overwatering leading to chlorophyll stability and increased medicinal potency.