The tblBooks table in the Books database contains a numeric field named Price. Which of the following determines the number of books whose price is at least $20? The dataset’s name is BooksDataSet.

a. Dim intNum As Integer =

Aggregate book In BooksDataSet.tblBooks
Where book.Price > 20
Into Count

b. Dim intNum As Integer =

Aggregate book In BooksDataSet.tblBooks
Where book.Price >= 20
Into Sum

c. Dim intNum As Integer =

Aggregate book In BooksDataSet.tblBooks
Where book.Price >= 20
Select book

d. Dim intNum As Integer =

Aggregate book In BooksDataSet.tblBooks
Where book.Price >= 20
Into Count