daily mini-test: 马马虎虎 (Advanced)

Advanced Level 高级 (gāojí)
Tom wasn’t so confident with the coming HSK exam, because he prepared for the HSK exam “马马虎虎 carelessly.” What is the Chinese pinyin for “马马虎虎 carelessly” in this sentence?
A. Kuàikuàilèlè
B. Mǎmǎhūhū
C. Tuántuányuányuán
D. Huānhuānxǐxǐ

See answer at http://resources.echineselearning.com/minitestanswers/minitestanswers-chinese-233.html?ecl=ptEEEEEEpg081403