Good morning! <3
Okay so when we look at the question it is asking what Whitman and Dickinson had in common, And Walt (Whitman's first name) Had a lot of things in common with Emily (Dickson's first name). They both seemed to focus on the same themes and characteristics in writing as each-other.
Your answer would come down to D. They both challenged the status quo of poetic expression.
~Littlebird17 ♥
The answer is a. To show that even seemingly eternal things are temporary,
The troposphere is the lowest level of the atmosphere, so it is in contact with the Earth's surface. In contrast, the stratosphere is located above the troposphere, so it is not in contact with the Earth's surface. ... The air density and air pressure are much lower in the stratosphere.