问题
Professor Smith is now ________ the company, which was once________ Professor White.
A:in charge of; in charge of
B:in charge of; in the charge of
C:in the charge of; in the charge of
D:in the charge of; in charge of
B:in charge of; in the charge of
C:in the charge of; in the charge of
D:in the charge of; in charge of
正确答案是：
