How can a reader make an inference about an author's unstated purpose? by determining the main topic of the passage
by taking a personal interest in the subject of the passage
by quoting a provable piece of information from the passage
O by making a reasonable guess based on information in the passage

D

Explanation:

it looks like the most reasonable answer, i give my apologies if this was incorrect/late

i confess that there are several parts of this constitution which i do not at present approve, but i am not sure i shall never approve them: for having lived long, i have experienced many instances of being obliged by better information or fuller consideration, to change opinions even on important subjects, which i once thought right, but found to be otherwise. it is therefore that the older i grow, the more apt i am to doubt my own judgment, and to pay more respect to the judgment of others.

c is the correct answer for this question.