A、The presidential election. B、Election rescue. C、Boycott of election. D、Political transition. C主旨大意题，应综合新闻的整体内容。新闻指出，苏丹大多数反对党这个

Most of the main opposition parties in Sudan are withdrawing from all the elections this month—the first multi-party elections since 1986. They won’t take part because of concerns about fraud and security. On Wednesday, the presidential candidate for the former southern rebels Yassir Arman pulled out. Special Envoy General Scott Gration from the US government has been in Khartoum trying to save the elections.
    Several major opposition parties have announced they will boycott the Sudanese elections at every level. Earlier today, they told the BBC they would boycott the presidential elections in protest of what they believe will not be free and fair polls. Now several of the parties have decided not to compete in the congressional or state elections either. The decision strikes a real blow at the elections which were meant to hold the democratic transformation in Sudan.
1 What caused the opposite parties to quit the election?
2 What is the news item mainly about?