What new knowledge enabled Arab and Indian sailors to develop the Indian Ocean trade, which some historians consider a maritime Silk Road?

Which choice best describes the general trend for the countries shown, for the period 2008 - 2010?

What do you call places that belong to united states but arent states

Two types of survey questions are open questions and closed questions. an open question allows for any kind of response; a closed question allows for only a fixed response. an open question and a closed question with its possible choices are given below. list the advantages and disadvantages of each question. open question: what can be done to get students to eat healthier foods? closed question: how would you get students to eat healthier foods? 1. mandatory nutrition course 2. offer only healthy foods in the cafeteria and remove unhealthy foods 3. offer more healthy foods in the cafeteria and raise the prices on unhealthy foods what are the advantages of an open question?