Which one of the following SAS programs requires the least CPU time to be processed?

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

A Frequency

1 500,000

2 500,000

6 7,000,000

8 3,000

Which one of the following SAS programs requires the least CPU time 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’;
D . data new;
set temp;
if a = 6 then
b = ‘Large ‘;
if a in (1, 2) then
b = ‘Small’;
run;