A. spread to Thailand and Vietnam by 2018 and was now estimated to be

Question

Discovered in Cambodia in 2015, Cassava Mosaic Disease  spread to Thailand and Vietnam by 2018 and was now estimated to be present in 10 percent of the surfaces cultivated in the region threatening millions of smallholders that cultivate cassava and generates  US$4 billion in export revenue

A. spread to Thailand and Vietnam by 2018 and was now estimated to be present in 10 percent of the surfaces cultivated in the region threatening millions of smallholders that cultivate cassava and generates

B. had spread to Thailand and Vietnam by 2018 and is now estimated to be present in 10 percent of the surfaces cultivated in the region, threatening millions of smallholders who cultivate cassava and generate

C. spreading to Thailand and Vietnam by 2018 and is now estimated to be present in 10 percent of the surfaces cultivated in the region threatening millions of smallholders cultivating cassava and generating

D. had spread to Thailand and Vietnam by 2018 and had been estimated to be present in 10 percent of the surfaces cultivated in the region, threatening millions of smallholders who cultivate cassava and generate

E. has spread to Thailand and Vietnam by 2018 and is now estimated to be present in 10 percent of the surfaces cultivated in the region, threatening millions of smallholders who cultivate cassava and generates

Source-  GMAT  Whiz

NiftyNiffler · Answer

Discovered in Cambodia in 2015, Cassava Mosaic Disease  spread to Thailand and Vietnam by 2018 and was now estimated to be present in 10 percent of the surfaces cultivated in the region threatening millions of smallholders that cultivate cassava and generates  US$4 billion in export revenue

A. spread to Thailand and Vietnam by 2018 and  was  now estimated to be present in 10 percent of the surfaces cultivated in the region threatening millions of smallholders that cultivate cassava and  generates   -- Estimation is being done in present, so "is now estimated" is correct

B. had spread to Thailand and Vietnam by 2018 and is now estimated to be present in 10 percent of the surfaces cultivated in the region, threatening millions of smallholders who cultivate cassava and generate  -- CORRECT, "by 2018" indicator makes past participle correct and right usage of participial modifier phrase (threatening...)

C.  spreading  to Thailand and Vietnam by 2018 and  is now estimated  to be present in 10 percent of the surfaces cultivated in the region threatening millions of smallholders cultivating cassava and generating  -- wrong parallelism

D. had spread to Thailand and Vietnam by 2018 and  had been estimated  to be present in 10 percent of the surfaces cultivated in the region, threatening millions of smallholders who cultivate cassava and generate  -- same reason as A

E.  has spread  to Thailand and Vietnam by 2018 and is now estimated to be present in 10 percent of the surfaces cultivated in the region, threatening millions of smallholders who cultivate cassava and  generates  ]-- The situation ended in past (2018), so present perfect tense is wrong; also has SVA issue.

So,  B

aggvipul · Answer

A. spread to Thailand and Vietnam by 2018 and was now estimated to be present in 10 percent of the surfaces cultivated in the region threatening millions of smallholders that cultivate cassava and generates -  was now

B. had spread to Thailand and Vietnam by 2018 and is now estimated to be present in 10 percent of the surfaces cultivated in the region, threatening millions of smallholders who cultivate cassava and generate -  sequence-> spread ---- by 2018, use of past perfect is correct with this sequencing. Comma threatening correctly modifies the result of the previous clause

C. spreading to Thailand and Vietnam by 2018 and is now estimated to be present in 10 percent of the surfaces cultivated in the region threatening millions of smallholders cultivating cassava and generating-  Cassava Mosaic Disease spreading to Thailand and Vietnam by 2018- it is a fragment

D. had spread to Thailand and Vietnam by 2018 and had been estimated to be present in 10 percent of the surfaces cultivated in the region, threatening millions of smallholders who cultivate cassava and generate -  use of past perfect continuous tense is wrong. Per the sentence the estimation is done now(in present)

E. has spread to Thailand and Vietnam by 2018 and is now estimated to be present in 10 percent of the surfaces cultivated in the region, threatening millions of smallholders who cultivate cassava and generates- generates should be generate

Raman109 · Answer

Discovered in Cambodia in 2015, Cassava Mosaic Disease  spread to Thailand and Vietnam by 2018 and was now estimated to be present in 10 percent of the surfaces cultivated in the region threatening millions of smallholders that cultivate cassava and generates  US$4 billion in export revenue

Option Elimination -

A. spread to Thailand and Vietnam by 2018 and was now estimated to be present in 10 percent of the surfaces cultivated in the region threatening millions of smallholders that cultivate cassava and generates - we need past perfect "had spread." "That" can't be used with people who are "smallholders." "was" and "now" can't be used together. Wrong.

B. had spread to Thailand and Vietnam by 2018 and is now estimated to be present in 10 percent of the surfaces cultivated in the region, threatening millions of smallholders who cultivate cassava and generate - ok

C. spreading to Thailand and Vietnam by 2018 and is now estimated to be present in 10 percent of the surfaces cultivated in the region threatening millions of smallholders cultivating cassava and generating - no verb for "Cassava Mosaic Disease."

D. had spread to Thailand and Vietnam by 2018 and had been estimated to be present in 10 percent of the surfaces cultivated in the region, threatening millions of smallholders who cultivate cassava and generate - usage of "had been estimated to be present." no reason to use past perfect passive and doesn't agree with the present tense verbs - cultivate cassava and generate. Wrong.

E. has spread to Thailand and Vietnam by 2018 and is now estimated to be present in 10 percent of the surfaces cultivated in the region, threatening millions of smallholders who cultivate cassava and generates - present perfect is wrong.

A. spread to Thailand and Vietnam by 2018 and was now estimated to be

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GMAT Sentence Correction (SC - EA only) Questions

A. spread to Thailand and Vietnam by 2018 and was now estimated to be

Prep Toolkit

615 to 715 in 15 Days (Ria's Strategies)

More than Quant/Verbal Abilities: Speed vs. Accuracy

745 with Only Self-Prep and GMAT Club

From 555 to 765: 210-point Improvement

Perfect 805 Score Debrief by Julia

My Rewards