The steamboat. it helped travel rivers upstream
The answer is : The crusades.
The Crusades were a series of religious wars between Christians and Muslims started primarily to secure control of holy sites considered sacred by both groups. In all, eight major Crusade expeditions — varying in size, strength and degree of success — occurred between 1096 and 1291.
Answer: it depends on your skill. but most tests are not easy unless you are Isacc Newton or Albert Einstein or Hawkings.
Explanation:if you are very sure you are prepared for this test then you should go for it. hope you get an A+
