Based on my encountered question, the choices would have been
a) sayings
b) assumptions
c) pacts
d) meditations
Assumptions and pacts are out. I am wavering between sayings and meditations. But meditations goes well with the sentence.
I try to exercise and read some meditations quietly everyday.
Meditation is not limited to an act of meditating. It is also a written or spoken discourse expressing deep thoughts on a subject.