IMO E

A) second it -- pronoun ambiguity
B) still continues : redundancy
C) same as B,
D) same as B, and being is almost always wrong on GMAT

what is OA ?

IMO E

A and B introduces another it after the modifier 'although it is eradicated in the United states'.
'is able to be' does not sound proper.

C and D sound awkward.Moreover the usage of 'still' before continuing is redundant.
E is concise and the modifier correctly modifies polio

Gmat_War wrote:IMO E

A and B introduces another it after the modifier 'although it is eradicated in the United states'.
'is able to be' does not sound proper.

C and D sound awkward.Moreover the usage of 'still' before continuing is redundant.
E is concise and the modifier correctly modifies polio

Nice explanation!! One more for E!

gmatmachoman wrote:

Gmat_War wrote:IMO E

A and B introduces another it after the modifier 'although it is eradicated in the United states'.
'is able to be' does not sound proper.

C and D sound awkward.Moreover the usage of 'still' before continuing is redundant.
E is concise and the modifier correctly modifies polio

Nice explanation!! One more for E!

What is the issue with IT in option B .

IT in B clearly refers to POLIO ? Why is it wrong ?

rockeyb wrote:

gmatmachoman wrote:

Gmat_War wrote:IMO E

A and B introduces another it after the modifier 'although it is eradicated in the United states'.
'is able to be' does not sound proper.

C and D sound awkward.Moreover the usage of 'still' before continuing is redundant.
E is concise and the modifier correctly modifies polio

Nice explanation!! One more for E!

What is the issue with IT in option B .

IT in B clearly refers to POLIO ? Why is it wrong ?

Hey Pranab,

there are two problems with answer B

- First, as someone has shown above. STILL CONTINUES is redundant.

- Second, as you concern, what could go wrong with IT when we clearly understand that it refers to Polio

In order to solve the second problem, first of all, we have to understand the usage of Pronoun. Pronouns are used to refer to the Nouns which stand right before these pronouns. As you can see in answer choice B, there are two nouns standing before it ( they are polio and the united states ). While we clearly understand that it refers to polio; however, the United states standing closer than Polio. According to the grammar rules, it can refer to it. So, there is a problem with the place of IT.

P/S: even thought we can tolerate the two problems discussed above, we can see that answer choice E is better than answer choice B. because answer choice E is more concise and shorter. Gmat like shorter and concise answer choice.

Guys ,

Thank you for your reply . I understand that in option B STILL and CONTINUES looks redundant . But I have seen sentences constructed like this . The reason I say this is that the OG in its explanation dose not even mention redundancy .

However what it dose mention is that IT in option although refers to POLIO it is ungrammatical .

Linh ,

Thanks for your reply but IT in option B dose not refer to US and it can not . Reason being IT here is too close to refer to US .

Have a look at the extract from MGMAT SC book :

The pronoun should normally refer to the CLOSEST eligible antecedent . NOTE that there is such and idea as TOO CLOSE .

Ex : In the station house IT is considered taboo. IT can not refer to station house .

Coming back to the question . If you see POLIO is in subject position and the pronoun IT in the second clause is also in subject position so it refers to POLIO .

Can any one explain in what case do we need to omit the pronoun and why is the use of IT in option B .

BTW OA : E .