Mo2men
mikemcgarry
Diets including more fruits, vegetables, fiber, and less red, processed meat are linked to lower colorectal cancer risk.
A. Diets including more fruits, vegetables, fiber, and less red, processed meat are
B. A diet includes more fruits, vegetables, and fiber, and less red and processed meat is
C. Diets that include more fruits, vegetables, fiber, less red, and processed meat are
D. Diets that include more fruits, vegetables, and fiber and less red and processed meat are
E. A diet that includes more fruits, vegetables, fiber, and less red and processed meat is
Dear Mike,
I have quick question about choice D. Should not be a 'comma' to separate the 2 lists as follows:
Diets that include more fruits, vegetables, and fiber[b], and less red and processed meat areThanks
Dear
Mo2men,
I'm happy to respond.

How are you, my friend?
The short answer is no. No comma needed. This is tricky to understand.
You see, what we have here are
nested parallelism, that is, parallelism within parallelism.
Here's the outer structure:
Diets that include more X and less Y are . . . That's the outer parallelism, and clearly, with just two elements, we don't need a comma separating them.
Now, each element dropped into slots X and Y contain an element of parallelism.
X =
fruits, vegetables, and fiber ==> contains correct parallelism
Y =
red and processed meat ==> contains correct parallelism
Now, we will drop these expressions for X & Y, exactly as they are, with their correct parallelism, into the outer structure, which is also correct, and other than straight substitution, we won't change a thing:
Diets that include more fruits, vegetables, and fiber and less red and processed meat are . . .
That's (D).
Does this make sense?
Take care, my friend. Have a wonderful weekend.
Mike