Which of the following most logically completes the argument?
Pluxtonica thrives in soil with high concentrations of chlorides that are toxic to most other plants. Plant scientists quoted in 'Journal of herbs' that Pluxtonica produces large amounts of Proline, an amino acid that, in experimental conditions, renders these chlorides chemically inert. Possibly, therefore, the herb's high Proline production is what allows it to grow in chloride -rich soils, a hypothesis that would gain support if ______.
A. the herb's high level of proline production is found to be associated with an unusually low level of production of other amino acids
B. proline is found in all parts of the plant-roots, stem, leaves, and flowers
C. cultivation of the herb in soil with high concentrations of the chlorides will, over an extended period, make the soil suitable for plants to which the metals are toxic
D. others of the closely related group of plants are also found to produce proline in large quantities
E. the concentration of proline in the growing herb declines as the plant approaches maturity
Pluxtonica thrives in soil with high concentrations of chlorides that are toxic to most other plants. Plant scientists quoted in 'Journal of herbs' that Pluxtonica produces large amounts of Proline, an amino acid that, in experimental conditions, renders these chlorides chemically inert. Possibly, therefore, the herb's high Proline production is what allows it to grow in chloride -rich soils, a hypothesis that would gain support if ______.
A. the herb's high level of proline production is found to be associated with an unusually low level of production of other amino acids
B. proline is found in all parts of the plant-roots, stem, leaves, and flowers
C. cultivation of the herb in soil with high concentrations of the chlorides will, over an extended period, make the soil suitable for plants to which the metals are toxic
D. others of the closely related group of plants are also found to produce proline in large quantities
E. the concentration of proline in the growing herb declines as the plant approaches maturity
