Sentence Correction

venmic wrote:

crack30 wrote:why not C?

I needed to understand Y not C

For C, I would ask ask the question when they did what? It is a bit ambiguous.

Considering the parallelism bit here, the 2nd part of the sentence after and would be to determine what they did.

But did what?

Regards
Anup

Can anyone explain ,
Why not C in terms of meaning issue between for and to ?
When to use for and to ?

kisna_428 wrote:Can anyone explain ,
Why not C in terms of meaning issue between for and to ?
When to use for and to ?

Kisna, {C} has other issue:

C. to determine how mammals colonized the islands of the West Indies and when they did "WHAT"

The option {C} doesn't really clearly states what Mammals did?

I chose E also.

Hi Experts,

I have the following doubts. Please address:

Scientists claim that the discovery of the first authenticated mammal bones in amber could provide important clues of determining, in addition to how, when mammals colonized the islands of the West Indies.


B:in the determination of how and when the islands of the West Indies were colonized by mammals - Why is this incorrect

D:for determining when the islands of the West Indies were colonized by mammals and how they were - Why is this incorrect