4. Here are some other websites your friend could check in order to get additional information about the expedition. Which two would you recommend first and why? (a) List of Supplies for the Expedition at http://www. pbs. org/lewisandclark/inside/idx_equ. html (b) Circa 1803 – Historical Background of the Times at http://www. pbs. org/lewisandclark/inside/idx_cir. html (c) Sacagawea at http://www. pbs. org/lewisandclark/inside/saca. html