Choose the option that correctly explains in words, the function of the following relational algebra expression year 2009 (book borrow)

Selects all the tuples from the natural join of book and student wherever the year is greater than or equal to 2009

Selects all tuples from the Cartesian product of book and borrow

Selects all the tuples from the natural join of book and borrow wherever the year is lesser than 2009

Selects all tuples from the Cartesian product of book and borrow wherever the year is greater than or equal to 2009

Choose the option that correctly explains in words, the function of th

1.	Choose the option that correctly explains in words, the function of the following relational algebra expression year 2009 (book borrow)
A.	Selects all tuples from the Cartesian product of book and borrow
B.	Selects all the tuples from the natural join of book and borrow wherever the year is lesser than 2009
C.	Selects all the tuples from the natural join of book and student wherever the year is greater than or equal to 2009
D.	Selects all tuples from the Cartesian product of book and borrow wherever the year is greater than or equal to 2009
Answer» C. Selects all the tuples from the natural join of book and student wherever the year is greater than or equal to 2009