If the Therapeutic Index of Drug X Is Low, Physicians

If the therapeutic index of Drug X is low, physicians

A) should take more care in prescribing it due to an increased chance of risks.
B) can take less care in prescribing it due to a decreased chance of risks.
C) should not prescribe it because it is too dangerous.
D) should not prescribe it because it is not effective.
E) should prescribe it because it is the most effective drug of its type.