Question

which of the following statements accurately describes why a new investigation was launched to study e. coli? new evidence showed that the current medicine had the same effect on the new strain of bacteria. previous studies showed that the current medicine could stop all bacteria growth in any strain. there were no previous studies on e. coli bacteria. new evidence showed that the current medicine did not have the same effect on the new strain of bacteria.

Explanation:

• Option A: If medicine had same effect, no new investigation needed. Eliminate.
• Option B: If medicine stopped all growth, no need for new study. Eliminate.
• Option C: Unlikely there were no prior E. coli studies. Eliminate.
• Option D: New strain with different medicine effect would prompt new investigation. Correct.

Answer:

D. New evidence showed that the current medicine did not have the same effect on the new strain of bacteria.