Which one of the following is the result of the program execution?

The variable attributes of SAS data sets ONE and TWO are shown below:

ONE TWO

# Variable Type Len Pos # Variable Type Len Pos

2 sales Num 8 8 2 budget Num 8 8

1 year Num 8 0 3 sales Char 8 16

1 year Num 8 0

Data set ONE contains 100 observations. Data set TWO contains 50 observations. Both data sets are sorted by the variable YEAR.

The following SAS program is submitted:

data three;

merge one two;

by year;

run;

Which one of the following is the result of the program execution?
A . No messages are written to the SAS log.
B . ERROR and WARNING messages are written to the SAS log.
C . Data set THREE is created with two variables and 50 observations.
D . Data set THREE is created with three variables and 100 observations.