Which of the following is true of the constitution of 1787 and slavery? despite protests from southern delegates, the document permanently freed runaway slaves who made it to the “free air” of the north. the constitution declared that all territories of the united states would be “free soil” where slavery would not be permitted. the constitution explicitly protected the security of property in slaves in any state of the union, so that a slave owner could move permanently with his slaves from south to north. the constitution provided for half of a state’s slave population to be counted in determining its membership in the house of representatives. although never using the word “slavery,” the document protected several aspects of the institution.