I answered C. and got it incorrect, so C. is NOT right.
They were worried he had grown too powerful.
The senators saw Caesar's growing power. They had just rebelled against an emperor to restore the republic, and didn't like Caesar's power grabs. Brutus had to choose loyalty or morality, and chose to assassinate a trusted friend in the name of his beliefs.
Answer:
In the course of my explorations 25 years ago, I found five sawmills located on or near the lower margin of the Sequoia belt . . .
Explanation: