It is definitely not that knowledge is derive from sensory experience. Descartes thought that we could establish fundamental truths a priori (without sensory experience) and then deduce from there on to general truths. The answer is the last one.
This is a sentence fragment, it has no subject so it is an incomplete sentence.
Meaning freedom is better than having someone keep you bound in hopes of benefits.
If the question is how are they related, it is a total comparison.