Which word has the similar meaning to "irritant" in Paragraph 3
A) disagreement C) annoyance
B) misunderstanding D) interference

A．EU has not signed partnership agreement with Russia.
B．EU is disappointed with at Russia's trade strategy.
C．EU wants Russia to cut down on tariffs on its meat imports.
D．EU may connect the trade conflict with Russia's entry into WTO.

A．The earth will become warmer.
B．It is somewhat suspicious of Michael Mann's assertion.
C．The earth reaches the highest temperature in the history.
D．The proxy measurements are reliable.