Which of the following best states China’s standpoint on the Iran nuclear issues?

Chinese President Hu Jintao will attend a major nuclear security summit in Washington later this month. Meanwhile, China has indicated it is willing to continue talks with all relevant parties on the Iran nuclear issues even if those discussions include imposing more sanctions on Iran.
    Chinese Foreign Ministry spokesman Qin Gang told reporters in Beijing Thursday that President Hu Jintao will attend the nuclear security summit in mid-April in Washington.
    Qin says the Chinese side is mostly concerned about the threat of nuclear terrorism and supports international efforts to strengthen cooperation to combat it. Another nuclear issue that dominated Thursday’s Foreign Ministry news conference involves Iran, which many in the international community suspect of developing nuclear weapons. There was news Wednesday that the five permanent members of the United Nations Security Council plus Germany agreed to start drawing up new sanctions against Iran because of its controversial nuclear program. This is significant because it would indicate China has dropped its longstanding opposition to sanctions against Iran. The Chinese spokesman Thursday would not say directly whether China supports international efforts to impose sanctions on Iran.