秘书如遇到客人在办公区吸烟，应( )。

A．劝说客人到办公楼外去吸烟

B．批评客人的行为，提醒他注意公共道德

C．引领其到吸烟区

D．为其准备烟缸

The following data sufficiency problems consist of a question and two statements, labeled (1) and (2), in which certain data are given. You have to decide whether the data given in the statements are sufficient for answering the question. Using the data given in the statements plus your knowledge of mathematics and everyday facts (such as the number of days in July or the meaning of counterclockwise), you must indicate whether.

If 5a=9b=15c, what is the value of a+b+c ？（）
(1) 3c-a=5c-3b
(2) 6cb=10a

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

D. EACH statement ALONE is sufficient.

E. Statements (1) and (2) TOGETHER are NOT sufficient.