ARIEN3228
Even in early February — while the world focused on China — the virus
was not only likely to be spreading in multiple American cities, but also seeding blooms of infection elsewhere in the United States.
A) was not only likely to be spreading in multiple American cities, but also seeding blooms
B) was not only likely to be spreading in multiple American cities, but also to be seeding blooms
C) was only likely to spread in multiple American cities, and also seeding blooms
D) were not only likely to be spreading in multiple American cities, but also to seed blooms
E) were not only likely to be spreading in multiple American cities, but also be seeding blooms
From the sentences we can see a 3 v/s 2 split, with "WAS" and "WERE"
Clearly the
subject is 'Virus', which is
singular.
Hence
D and E are outNow lets take C first.
C has both grammatical and meaning issues. Analysing from both perspectives -
Meaning issue with C -> The initial prompt says 2 things happened.
1. Virus was likely to be spreading in multiple American cities
2. Virus was likely to be seeding blooms of infection elsewhere in the United States
But option C says that 2 things happened.
1. Virus was only likely to spread in multiple American cities (not anywhere else in the world).
2. Virus was seeding blooms of infection elsewhere in the United States.
So you see how their is a clear difference between the prompt and option. Hence C is out on the basis of meaning. Lets move to the grammtical error with C
Grammatical error with C -> 1. 'and also' is redundant. Also is never required after and (atleast on the GMAT

)
2. Parallelism issue. The phrases "to spread in multiple American cities" and "seeding blooms of infection elsewhere in the United States" should be parallel but they are not making it an issue.
Hence
C is OutNow we are left only with A and B. Lets put them side by side -
A) was not only likely to be spreading in multiple American cities, but also seeding blooms
B) was not only likely to be spreading in multiple American cities, but also to be seeding blooms The only difference between the two is of two words, that is, "to be".
Now if you note this to be
changes meaning from prompt and also
distorts parallelism.
Meaning wise -> The prompt says "virus was likely spreading and was likely seeding blooms of infection"
The option says "virus was likely spreading and was seeding blooms of infection"
You see the difference ?
Addition of 'to be' makes the seeding definite and not likely and that is, for sure, not the case or original meaning.
Parallelism ->[not only] likely to be spreading in multiple American cities,
[but also] to be seeding blooms
You notice how the adverb 'likely' is present in the first part of not only but missing in the second part after but also.
Hence
B is OutNow most you might ask, everything is okay but how is A correct as it is missing 'likely to be' in the second part and destroying parallelism.
The answer to this is
Ellipses.
Ellipses has omitted the already understood part from the previous 'not only clause' - likely to be.
I get that this may not be the most suitable sentence but is the best of the lot.
Hoping this to be helpful.