The correct matches are the following.
Next to each short event or account, write either historical or unhistorical.
a. George Washington never told a lie. Historical.
b. Hildegard of Bingen had visions from god. Historical.
c. Hildegard of Bingen wrote about visions from god. Historical.
d. Native African people are not capable of constructing with stone. Unhistorical.
e. Romans built roads. Historical.
When we refer to the term historical, we mean that the statement is based on historical events. So we can search on primary or secondary sources to find the topic and the argument. Then historical means it is based on historical facts that can be supported. On the contrary, the term unhistorical means that there is no historic support to the claim, and probably the statement is only based on oral tradition, suppositions, or deductions.