A non-correlated subquery can be defined as________ .

A.
a set of sequential queries, all of which must always return a single value

B.
a set of sequential queries, all of which must return values from the same table

C.
a SELECT statement that can be embedded in a clause of another SELECT statement only

D.
a set of one or more sequential queries in which generally the result of the inner query is used
as the search value in the outer query