Answer the following question: Write a multi-choice question for the following article: Article: (By CCTV correspondent Vanessa Duffy 04/28/2013 08:36) It's been eight days since a 7.0-magnitude strong earthquake hit China's Lushan Ya'an Sichuan Province.How the earthquake has affected one of Sichuan Province's special residents --pandas.How are the animals living? And do they have enough food to eat? There are more than 80 pandas living here at the Chengdu Panda Breeding Base .The quake was felt strongly in Chengdu.Fortunately,all of the pandas here were out on the grounds when the earthquake hit,so they were very safe. Several days have passed and the earthquake seems to have made no negative impact on the pandas.These two baby pandas Chengshuang and Chengdui are playfighting with each other and climbing trees.When they climbed too high,the breeders have to _ them from the trees. The quake zone is not only the home of these pandas,it's also the source of their food.Fortunately,enough bamboo has been stored away in five bamboo storehouses for the pandas,so there are no worries about food supplies. Wu Kongju,Breeder,Chengdu Panda Breeding Base,said,"When the Wenchuan earthquake happened on May 12,2008,we were unprepared and had a shortage of bamboo.But we've been able to handle this earthquake event more smoothly.There are no problems with the food supply."
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Question: When did the 7.0-magnitude earthquake happen in Lushan Sichuan Province?Options:A On April 28,2013B On May 12,2008C On April 20,2013D On May 20,2013Answer:C