阅读下列短文，从每题所给的四个选项（A、B、C、D）中，选出最佳选项，并在答题纸上将该选项标号涂黑。
A
Taiwan will finalize a plan by the end of June to open up the island to tourists from mainland China, though no date has been fixed for formal implementation（执行）, an official at the Mainland Affairs Council（MAC）said on Monday．
The official said the reports in the local press on Monday that the MAC has decided to postpone its plan to announce the implementation of the new plan on July 1 were inaccurate．
The official said cooperation between different organizations was still underway．The United Daily news quoted the director of the MAC’s legal affairs department, Liu Thehsun, as saying the plan to open up to mainland tourists would not be implemented as scheduled due to a lack of cross-strait communication．
Although relevant authorities, including the Bureau of Immigration and the Tourism Bureau, have complete reports on how to deal with visitors from mainland China,
