<span>The opiates are highly addictive drugs that suppress physical sensation and responsiveness to stimulation.
Opiates is a </span>a medication/drug with morphinelike impacts.
We reject the options a) and b) since the question says that the data supports "equally" both cases - so we have no basis for making a choice either way.
Further, in science the decisions are reached based on facts, not voting, so we also reject the answer D .
We are left with the answer C and this is also the best practice in science - when unsure, leave it as a hypothesis.
