Base SAS 51

A raw data file is listed below:
--------10-------20-------30
squash 1.10
apples 2.25
juice 1.69
The following SAS program is submitted using the raw data file above:
data groceries;
infile 'file-specification';
input item $ cost;

run;
Which one of the following completes the program and produces a grand total for all COST values?
A. grandtot = sum cost;
B. grandtot = sum(grandtot,cost);
C. retain grandtot 0;
grandtot = sum(grandtot,cost);
D. grandtot = sum(grandtot,cost);
output grandtot;
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