According to Studies Conducted by Gerd Lüer and His Colleagues

According to studies conducted by Gerd Lüer and his colleagues, why can Chinese students, as a group, retain more items in short-term memory than German students can?

A) Chinese students, on average, are more intelligent than German students.
B) Chinese students have more practice memorizing information than German students do.
C) Mandarin Chinese words often have fewer speech syllables than German words.
D) none of the above