Read the sentence from “Colony Collapse Disorder.”

Scientists thoroughly studied a variety of possible causes, ranging from genetically modified crops to climate change to cell phone towers.

How does the use of the word thoroughly affect the tone of the excerpt?

Responses

It creates an excited tone.
It creates an excited tone.

It creates a determined tone.
It creates a determined tone.

It creates a self-assured tone.
It creates a self-assured tone.

It creates a confident tone.
It creates a confident tone.