Iwill mark you brainlist

how does the central waterway shown benefit indonesia, malaysia, and singapore?

a.
it offers people who live in the region an abundant source of clean water.

b.
it provides natural sea barriers to defend them against attack and conquest.

c.
it provides a channel by which they can restrict access to the region by foreign nations.

d.
it ensures a large volume of shipping and trade passes through their ports each year.