True or false? virtually all surface water is polluted and needs to be treated before it can be safely consumed.

it id the first and last option

muslims control the north africa during the period of 1500 up

to 1800. they made a barrier to prevent further european exploration from

entering the africa from the north. however, the dutch ware still able to move

toward the interior with having south africa as one of the routes leading to

the east for trading with asia.