Answer:
Option D - 
Step-by-step explanation:
Given : The polynomials.
To find : Choose the polynomial that is written in standard form.
Solution :
The standard form of writing the polynomial is based on order of degree.
The order of degree is written from highest to lowest.
A) 
Highest degree is 7 so
it come first.
So, No it is not in standard form.
B) 
Highest degree is 9 so
it come first.
So, No it is not in standard form.
C) 
Highest degree is 11 so
it come first.
So, No it is not in standard form.
D) 
This is written in standard form as
Highest degree is 8 so
come first.
Second highest degree is 4 so
come second.
Third highest degree is 2 so
come third.
Therefore, Option D is correct.
The polynomial that is written in standard form is 