The correct answer is C.
The daughter persuades him. He was first reluctant, but she convinces him at the end.<span />
After he painted the office blue, he dyed his hair green.
Since I left you, my whole life has changed.
Although, she loved her job, it did not play very much.
Whenever I go to the beach, I become sunburned.
Rene Descartes was a French mathematician wherein he was coined to be the "Father of Modern Philosophy." He was famously credited to the line "I think, therefore I am" in which he was the leading figure in the development of mechanistic sciences. In addition, the excerpt most likely conveys the Descartes used a modest tone.
1. showing a willingness to take surprisingly bold risks.
2. Unrestrained by convention or propriety; brazen or insolent: audacious rudeness.
Answer: (B) External
If it were internal, then it would be "Man Vs. Self." It would be in his mind. But he is fighting nature. He is fighting something other than himself. Something outside. (Not literally.)