While our city tries impatiently to change its appearance by tearing down old buildings, more andmore

citizens are suggesting ways to ____ the historically important architecture. [ ]

A. decorate    

B. develop      

C. preserve    

D. advocate

有如下程序：
Private Sub command1_Click()
a=1:b=1
Print“a=”：a;“，b=”；b
Call mult(a)，b)
Prinf“a=”；a：“，b=”；b 语句
End Sub
Sub mult(x,y)
k=1
x=2*k
y=3*k
Pnint“X=“；X；“，y=”；y
End Sub
运行后，标有“语句”的Print语句的输出结果是 (8) 。