Agree with D. The safest deduction.
D is correct.
A B and C are obviously wrong.
For E, a big clue is the "STRONG WORDING" of E.... any inference is just
a slight extension of the agruments conclusion...
E says too much..
1. How does one know what the immigrants diet was...were they eating fast food /snacks left right and center...
2. How can we say that fat causes cancer. Let us remember not to influence our choice by our own experience (easier said that done)
D goes a little further in that it does not try to very specific.. it leaves room for other causes...it just rules out one.
As to vicks comment, even D brings info outside the argument.
With E, in fact, DIET is mentioned in the argument. so one might be tempted to select E, which is what i did.