What process do people go through to solidify their understanding of something they have read?

To solidify is to make something solid or to fully understand, like water becoming ice, or a plan becoming more concrete. If you're meeting a friend, you should solidify the plan before you go and decide where and what time to meet.

Explanation:

make stronger; reinforce.

"social and political pressures helped to solidify national identities"

i think that the best option for this question is

d)to persuade readers that a prince must eradicate the royal family of a conquered principality.

i hope this .

the objective should be switched