In my opinion, the implied claim here is "<span>You had better take an umbrella with you." It is a claim that can be inferred from the first claim about the barometer showing the pressure. An implied claim doesn't have to be explicitly said. It comes as a conclusion to the premise. When your mother tells you about the weather forecast while you are preparing to leave, she usually implies that you should dress accordingly.</span>
<span>Since the barometer is falling, the extra claim in the statement is that a falling barometer indicates that rain will be in the immediate forecast. Stating that you should bring an umbrella with you suggest the falling barometer implies rain.</span>
The sentences that use rhetorical devices are: C) Outside, the torrential rain poured like a waterfall E) Saving the orangutans is a Herculean task for conservationists. The first sentence uses simile, and the second one a metaphor/allusion.
