A.
SELECT T1.A,T2.B,T3.C FROM T1 INNER JOIN T2 ON T1.A=T2.A
B.
NER JOIN T3 ON T2.B=T3.B
C.
SELECT T1.A,T2.B,T3.C FROM T1 INNER JOIN T2 INNER JOIN T3
D.
T2.B=T3.B ON T1.A=T2.A
E.
SELECT T1.A,T2.B,T3.C FROM T1 , T2,T3 WHERE T1.A=T2.A
G.
SELECT T1.A,T2.B,T3.C FROM T1 INNER JOIN T2 INNER JOIN T3
H.
T1.A=T2.A ON T2.B=T3.B