Iranian prophet

[akhpad]

Source: Kaplan

Founded by the Iranian prophet and reformer Zoroaster in the sixth century B.C., Zoroastrianism, containing both monotheistic and dualistic features, were influencing the three other major Western religions.

(A) were influencing
(B) which influencing
(C) influenced
(D) which had influenced
(E) had influenced

I confused over C and E.

OA: C

[liferocks]

I am confused too..but IMO ans should be C
reason is past perfect is used to describe past of past.Here we do not have another time reference(clearly 'Founded' cannot be treated as time reference as Zoroastrianism cannot influence anything before it is founded. )

What is OA?

[M811]

Source: Kaplan

Founded by the Iranian prophet and reformer Zoroaster in the sixth century B.C., Zoroastrianism, containing both monotheistic and dualistic features, were influencing the three other major Western religions.

(A) were influencing
(B) which influencing
(C) influenced
(D) which had influenced
(E) had influenced

I confused over C and E.

IMO C

Zoroastrianism influenced the three other major western religions

[deepak_free]

Please please do not show the eliminations without spoiler :-(

[loveusonu]

Source: Kaplan

Founded by the Iranian prophet and reformer Zoroaster in the sixth century B.C., Zoroastrianism, containing both monotheistic and dualistic features, were influencing the three other major Western religions.

(A) were influencing
(B) which influencing
(C) influenced
(D) which had influenced
(E) had influenced

I confused over C and E.

OA: C

"Had Influenced" is INCORRECT over here; it would mean before Zoroastrianism was founded it had inspired. Hence sequence can't be correct and has to be considered as parallel past events.
It should be "Influenced only"

[jaggies]

IMO : C

[neerajbansal]

Founded by the Iranian prophet and reformer Zoroaster in the sixth century B.C., Zoroastrianism, containing both monotheistic and dualistic features, were influencing the three other major Western religions.

(A) were influencing
Wrong tense...

(B) which influencing
Wrong tense

(C) influenced
Cream of the crap...The best one...

(D) which had influenced
There is a sequence of events..Zora was found before and then it influenced...

(E) had influenced
There is a sequence of events..Zora was found before and then it influenced...

[Dead_Beat]

A)
1) can't use the plural verb " were influencing " for a singular subject.
2)"-ing" form should describe the ongoing activities during a specified period, which took place in the past hence WRONG ☠�
B)
1)The sentence looks like there is no main verb.
. 2)Which is ambiguous
D)
1)Double past not preferred in GMAT
. 2)As the time frame "in the sixth century B.C." is described in the passage hence, the event is bounded. Can't happen before that.
3)Same as B.
E)
1) Double Past not preferred.
2) Same as D(2).
"C" is correct.