$$customer$\_$name, loan$\_$number, amount $($borrower $$loan$)$

What does the above expression perform?

a$.$ It finds the customer$\_$name, loan$\_$number and amount from loan

b$.$ It finds the customer$\_$name, loan$\_$number and amount from the natural join of borrower and loan

c$.$ It finds the customer$\_$name, loan$\_$number and amount from the full outer join of borrower and loan

d$.$ none of these

e$.$ It finds the customer$\_$name, loan$\_$number and amount from borrower