All 282 laws of Hammurabi's Code were also probably read aloud in public on a regular basis no one could be excused for committing a crime because of not knowing the law. Although however above all so that

So that

Explanation:

Reading of the 282 laws aloud in public, every day was done to ensure that everyone knows it, by doing that no one can give excuse for doing contrary to it

"so that" as a subordinate clause and conjunction shows the action and the effect on the people

Action: Reading the 282 laws everyday in public aloud.

Effect: it doesn't give room for excuses, if one goes contrary

so that

Explanation:

From the given options, "so that" is the appropriate answer because it is a conjunction that is used when you are expressing reason, making an explanation about the clause or telling about a consequence.  

In this question, the second clause (after the blank) is expressing the reason for the condition that is mentioned in the first clause.