45. The SAS data set TEMP has the following distribution of values for variable A:
TEMP

A Frequency
1 500,000
2 500,000
6 7,000,000
8 3,000

Which SAS pr ogram
requires the least amount of CPU resources to be processed?  

A.data new; set temp; if a = 8 then b = 'Small '; else if a in(1, 2) then b = 'Medium'; else if a
= 6 then b = 'Large'; run;  

B.data new; set temp; if a in (1, 2) then b = 'Medium'; else if a = 8 then b = 'Small'; else if a
= 6 then b = 'Large'; run;  

C.data new; set temp; if a = 6 then b = 'Large '; else if a in (1, 2) then b = 'Medium'; else if
a = 8 then b = 'Small'; run;  

D.data new; set temp; if a in (1, 2) then b = 'Medium'; else if a = 6 then b = 'Large '; else if
a = 8 then b = 'Small'; run;  

Answer: C

请问为什么是C而不是D啊？ 这是adv130上的题目