请问下这句英文的意思是?I refused to spend the last 80 years of my life

请问下这句英文的意思是?
I refused to spend the last 80 years of my life plummeting downhill,or even leveling off.
有4个选项：A.The write will not spend the rest of her time at college.
B.The write will not just obtain a college level certificate.
C.The write will not be satisfied with what she has already achieved.
D.The write will not be content with the life in the future.
文章主要说作者不认为大学是一个人最好的时光,她比较期待未来