For the following 3 tables:

A(X(PK), Y)

B(Z(PK), X(FK)) -- X references A's X

C(W(PK), Z(FK)) -- Z references B's Z

What would be true of the following query?

SELECT *

FROM A, B, C

WHERE A.X = B.X AND B.Z = C.Z

a. The result has 6 columns

b. The size of the result is 1

c. The size of the result is the size of the largest table (in number of rows)

d. The result has 4 columns