題目：
The project team is currently conducting two global case studies, one on commu
nity engagement in research in the developing world and _________ on commercia
lization of heath products in low-resource settings.
(A) another (B) the other
答案是A，但是前面已經提到two global case studies了，不是應該要用表達兩者的the
other嗎？怎麼會是用表達三者以上的another呢？